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

Author

Antti Karttunen, Dec 24 2015

Keywords

• nonn

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.