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A265898 Numbers n for which (2n)! / n! [= A001813(n)] is >= k! but < 2*k! for some k; positions of ones in A265894. 5
0, 1, 3, 6, 8, 11, 14, 17, 20, 27, 34, 41, 45, 49, 81, 85, 89, 102, 106, 115, 124, 128, 137, 142, 146, 151, 160, 169, 174, 188, 193, 202, 207, 212, 231, 236, 241, 246, 251, 256, 306, 311, 316, 321, 326, 331, 336, 357, 362, 367, 383, 388, 393, 409, 414, 425, 430, 446, 462, 478, 489, 494, 505, 516, 521, 532, 543, 554, 565 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(0) = 0 is a special case in this sequence, thus the indexing starts from zero.

Numbers n such that A001813(n) is in A265334.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..843

CROSSREFS

After zero-term, a subsequence of A265899.

Cf. A001813, A265894, A265334.

Cf. also A265897.

Sequence in context: A325946 A050503 A265899 * A133869 A276573 A085197

Adjacent sequences:  A265895 A265896 A265897 * A265899 A265900 A265901

KEYWORD

nonn

AUTHOR

Antti Karttunen, Dec 24 2015

STATUS

approved

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Last modified April 14 07:32 EDT 2021. Contains 342946 sequences. (Running on oeis4.)