A094971 a(n) = floor(9^n/2^n).

1, 4, 20, 91, 410, 1845, 8303, 37366, 168151, 756680, 3405062, 15322783, 68952523, 310286355, 1396288601, 6283298708, 28274844190, 127236798856, 572565594852, 2576545176835, 11594453295761, 52175039830928, 234787679239180

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..900

Mathematica

Table[ Floor[(9/2)^n], {n, 0, 30}]

Prog

(Magma) [Floor(9^n / 2^n): n in [0..30]]; // Vincenzo Librandi, Sep 08 2011
(PARI) a(n)=9^n>>n \\ Charles R Greathouse IV, Feb 04 2016

Crossrefs

Cf. A002379, A094969-A094999.

Sequence in context: A328153 A070733 A166175 * A239650 A218837 A254943

Adjacent sequences: A094968 A094969 A094970 * A094972 A094973 A094974

Keyword

nonn,easy

Author

Robert G. Wilson v, May 26 2004

Status

approved