The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A265897 Numbers n for which (2n+1)! / n! [= A000407(n)] is >= k! but < 2*k! for some k; positions of ones in A265891. 4
 0, 1, 3, 8, 11, 14, 17, 20, 23, 30, 37, 41, 52, 56, 60, 64, 68, 72, 76, 89, 93, 97, 106, 110, 119, 128, 132, 137, 146, 155, 164, 169, 178, 183, 197, 202, 216, 221, 226, 231, 260, 265, 270, 275, 280, 285, 290, 295, 300, 331, 336, 341, 346, 351, 367, 372, 377, 393, 398, 403, 414, 419, 435, 440, 451, 456, 467, 472, 483, 494, 499, 510 (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 A000407(n) is in A265334. LINKS Antti Karttunen, Table of n, a(n) for n = 0..845 CROSSREFS Cf. A000407, A265891, A265334. Cf. also A265898. Sequence in context: A020680 A243169 A051245 * A003157 A310281 A287365 Adjacent sequences:  A265894 A265895 A265896 * A265898 A265899 A265900 KEYWORD nonn AUTHOR Antti Karttunen, Dec 24 2015 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 12 01:45 EDT 2021. Contains 343808 sequences. (Running on oeis4.)