A051036 a(n) = binomial(n, floor(n/4)).

1, 1, 1, 1, 4, 5, 6, 7, 28, 36, 45, 55, 220, 286, 364, 455, 1820, 2380, 3060, 3876, 15504, 20349, 26334, 33649, 134596, 177100, 230230, 296010, 1184040, 1560780, 2035800, 2629575, 10518300, 13884156, 18156204, 23535820, 94143280, 124403620

Offset

0,5

Links

Seiichi Manyama, Table of n, a(n) for n = 0..1000

Mathematica

a[n_] := Binomial[n, Floor[n/4]]; Array[a, 50, 0] (* Enrique Pérez Herrero, Mar 06 2012 *)

Prog

(Python)
from math import comb
def A051036(n): return comb(n, n>>2) # Chai Wah Wu, Feb 02 2023

Crossrefs

Cf. A001405, A051033, A051052, A051053, A062947.

Sequence in context: A071177 A010754 A187807 * A387345 A063673 A105737

Adjacent sequences: A051033 A051034 A051035 * A051037 A051038 A051039

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved