A265898 Numbers n for which (2n)! / n! [= A001813(n)] is >= k! but < 2*k! for some k; positions of ones in A265894.

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

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: A050503 A265899 A362882 * A133869 A368642 A356395

Adjacent sequences: A265895 A265896 A265897 * A265899 A265900 A265901

Keyword

nonn

Author

Antti Karttunen, Dec 24 2015

Status

approved