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Revisions by Wouter Meeussen (See also Wouter Meeussen's wiki page)

(Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A370852 Irregular triangle read by rows: row n is the list of residues mod n that occur among the Markov numbers
(history; published version)
#4 by Wouter Meeussen at Sun Mar 03 14:10:48 EST 2024
STATUS

editing

proposed

Discussion
Sun Mar 03 14:21
Michel Marcus: data setion is too big: I think should stop after 1, 2, 5, 9, 13
14:37
William P. Orrick: Michel Marcus, you are right. I will take this back to editing until that, and a few outer mistakes, are corrected.
#3 by Wouter Meeussen at Sun Mar 03 13:45:33 EST 2024
LINKS

Martin Aigner, <a href="https://archive.org/details/markovstheorem100000aign.html">Markov's theorem and 100 years of the uniqueness conjecture. A mathematical journey from irrational numbers to perfect matchings</a>, [archive.org copy of the book].

EXTENSIONS

~~~ ".html" added to link.

Discussion
Sun Mar 03 14:10
Wouter Meeussen: I advise to lift W. Orrick's editting and submission limitations. His work is very good.
A368546 Alternative version of the Markov tree A327345.
(history; published version)
#48 by Wouter Meeussen at Fri Jan 19 05:21:16 EST 2024
STATUS

proposed

reviewed

A122946 a(0)=a(1)=0, a(2)=2; for n >= 3, a(n) = a(n-1) + 4*a(n-3).
(history; published version)
#12 by Wouter Meeussen at Tue Jan 16 19:39:38 EST 2024
STATUS

editing

proposed

#11 by Wouter Meeussen at Tue Jan 16 19:37:59 EST 2024
COMMENTS

~~~ _Wouter Meeussen_, Jan 16 2024 Conjecture: count of even Markov numbers in generation n (with generations 0, 1 and 2 labeled as {5} , {13, 29} and {34, 194, 433, 169}. (Checked up to generation 20).

EXTENSIONS

~~~ _Wouter Meeussen_, Jan 16 2024 Markov conjecture added.

#10 by Wouter Meeussen at Tue Jan 16 19:34:00 EST 2024
COMMENTS

~~~ Conjecture: count of even Markov numbers in generation n (with generations 0, 1 and 2 labeled as {5} , {13, 29} and {34, 194, 433, 169}. (Checked up to generation 20).

CROSSREFS

Cf. A002487.; A002559

EXTENSIONS

Entries checked by Zak Seidov, Oct 26 2006;

~~~ Markov conjecture added.

STATUS

approved

editing

A362548 Number of partitions of n with at least three parts larger than 1.
(history; published version)
#13 by Wouter Meeussen at Mon Apr 24 17:02:37 EDT 2023
MATHEMATICA

Table[PartitionsP[n]-(1 + Floor[n^2/4]), {n, 0, 30}];

Table[ Count[Partitions[n], pa_ /; Length[DeleteCases[pa, 1]] > 2] , {n, , 0, 30}]

Discussion
Mon Apr 24 17:03
Wouter Meeussen: now starting with offset 0, Mathematica formulae adapted.
#9 by Wouter Meeussen at Mon Apr 24 16:58:15 EDT 2023
STATUS

proposed

editing

#8 by Wouter Meeussen at Mon Apr 24 16:57:22 EDT 2023
STATUS

editing

proposed

#7 by Wouter Meeussen at Mon Apr 24 16:54:49 EDT 2023
DATA

0, 0, 0, 0, 0, 1, 2, 5, 9, 16, 25, 40, 58, 85, 119, 166, 224, 303, 399, 526, 681, 880, 1122, 1430, 1801, 2266, 2827, 3521, 4354, 5378, 6601, 8092, 9870, 12020, 14576, 17652, 21294, 25653, 30804, 36937, 44162, 52732, 62798, 74690, 88627, 105028, 124201, 146696, 172924, 203600, 239292, 280912

OFFSET

1,67

EXTENSIONS

as requested by M. Marcus.

Discussion
Mon Apr 24 16:57
Wouter Meeussen: @Alois P. Heinz : well spotted! a leading zero escaped the copy-pasting. Corrected.

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Last modified August 30 04:38 EDT 2024. Contains 375526 sequences. (Running on oeis4.)