A053638 a(n) = ceiling(2^n/n).

2, 2, 3, 4, 7, 11, 19, 32, 57, 103, 187, 342, 631, 1171, 2185, 4096, 7711, 14564, 27595, 52429, 99865, 190651, 364723, 699051, 1342178, 2581111, 4971027, 9586981, 18512791, 35791395, 69273667, 134217728, 260301049, 505290271

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Formula

a(n) = A082482(n) + 1.

Mathematica

Table[Ceiling[2^n/n], {n, 1, 40}] (* Vincenzo Librandi, Dec 19 2011 *)

Prog

(Magma) [Ceiling(2^n/n): n in [1..40]]; // Vincenzo Librandi, Dec 19 2011
(PARI) a(n)=ceil(2^n/n) \\ Charles R Greathouse IV, Apr 17 2012
(Sage) [ceil(2^n/n) for n in (1..40)] # G. C. Greubel, May 17 2019

Crossrefs

Cf. A082482, A053637, A053639.

Sequence in context: A110871 A243856 A173433 * A051920 A286350 A023105

Adjacent sequences: A053635 A053636 A053637 * A053639 A053640 A053641

Keyword

nonn,easy

Author

N. J. A. Sloane, Mar 23 2000

Status

approved