The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A245091 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A245091

Number of (2n+1)-node rooted identity trees of height n.
(history; published version)

#9 by OEIS Server at Mon Mar 09 22:39:16 EDT 2015

LINKS

Alois P. Heinz, <a href="/A245091/b245091_1.txt">Table of n, a(n) for n = 0..300</a>

#8 by Alois P. Heinz at Mon Mar 09 22:39:16 EDT 2015

STATUS

editing

approved

Discussion

Mon Mar 09

22:39

OEIS Server: Installed new b-file as b245091.txt.  Old b-file is now b245091_1.txt.

#7 by Alois P. Heinz at Mon Mar 09 22:39:12 EDT 2015

LINKS

Alois P. Heinz, <a href="/A245091/b245091_1.txt">Table of n, a(n) for n = 0..125300</a>

STATUS

approved

editing

#6 by Vaclav Kotesovec at Sat Jul 12 03:44:27 EDT 2014

STATUS

editing

approved

#5 by Vaclav Kotesovec at Sat Jul 12 03:44:20 EDT 2014

FORMULA

a(n) ~ c * d^n / sqrt(n), where d = 4.9159375028212... (same as for A245090), c = 0.076188269997... . - Vaclav Kotesovec, Jul 12 2014

STATUS

approved

editing

#4 by Alois P. Heinz at Fri Jul 11 21:57:03 EDT 2014

STATUS

editing

approved

#3 by Alois P. Heinz at Fri Jul 11 21:57:00 EDT 2014

LINKS

Alois P. Heinz, <a href="/A245091/b245091.txt">Table of n, a(n) for n = 0..125</a>

#2 by Alois P. Heinz at Fri Jul 11 20:31:38 EDT 2014

NAME

allocated for Alois P. Heinz

Number of (2n+1)-node rooted identity trees of height n.

DATA

1, 0, 0, 2, 12, 61, 301, 1460, 7019, 33628, 160934, 770109, 3686706, 17661288, 84675601, 406319271, 1951428049, 9380072046, 45124798445, 217252113080, 1046731684143, 5046754081095, 24348794377704, 117547968556766, 567818803946292, 2744396907325759

OFFSET

0,4

FORMULA

a(n) = A227819(2n+1,n).

CROSSREFS

Cf. A227819.

KEYWORD

allocated

nonn

AUTHOR

Alois P. Heinz, Jul 11 2014

STATUS

approved

editing

#1 by Alois P. Heinz at Fri Jul 11 20:28:17 EDT 2014

NAME

allocated for Alois P. Heinz

KEYWORD

allocated

STATUS

approved