The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A355139 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A355139

The indices where A355061(n) = 6.
(history; published version)

#8 by Michael De Vlieger at Tue Jun 21 10:28:12 EDT 2022

STATUS

proposed

approved

#7 by Scott R. Shannon at Tue Jun 21 06:26:02 EDT 2022

STATUS

editing

proposed

#6 by Scott R. Shannon at Tue Jun 21 06:17:11 EDT 2022

CROSSREFS

Cf. A355061, A355138.

Discussion

Tue Jun 21

06:26

Scott R. Shannon: Submitting A355061, A355138, A355139 together.

#5 by Michael S. Branicky at Mon Jun 20 11:52:17 EDT 2022

PROG

(Python)

from sympy import primefactors

from itertools import count, islice

def agen(): # generator of terms

an1, an, f1, f, pset = 2, 6, {2}, {2, 3}, {2, 12}

for n in count(4):

if an == 6: yield n-1

an2, an1, an, f2, f1 = an1, an, 6, f1, f

f = set(primefactors(an))

while an*an1 in pset or f1&f == set() or f2&f != set() or f <= f1:

an += 1; f = set(primefactors(an))

pset.add(an*an1)

print(list(islice(agen(), 54))) # Michael S. Branicky, Jun 20 2022

#4 by Scott R. Shannon at Mon Jun 20 09:01:09 EDT 2022

COMMENTS

~See A355061 for further details.

#3 by Scott R. Shannon at Mon Jun 20 08:56:51 EDT 2022

COMMENTS

~See A355061 for further details.

#2 by Scott R. Shannon at Mon Jun 20 08:55:58 EDT 2022

NAME

allocated for Scott R. Shannon

The indices where A355061(n) = 6.

DATA

3, 7, 11, 19, 46, 75, 113, 138, 169, 186, 227, 240, 287, 374, 382, 481, 528, 536, 672, 713, 722, 760, 836, 922, 972, 1015, 1031, 1052, 1077, 1122, 1144, 1235, 1244, 1371, 1392, 1466, 1549, 1613, 1669, 1859, 1938, 2059, 2109, 2118, 2127, 2391, 2557, 2661, 2730, 2739, 2765, 2798, 2949, 2962

OFFSET

1,1

CROSSREFS

Cf. A355061.

KEYWORD

allocated

nonn

AUTHOR

Scott R. Shannon, Jun 20 2022

STATUS

approved

editing

#1 by Scott R. Shannon at Mon Jun 20 08:55:58 EDT 2022

NAME

allocated for Scott R. Shannon

KEYWORD

allocated

STATUS

approved