A135964 a(n) = binomial(floor(n*sqrt(2)),n) for n>=0.

1, 1, 1, 4, 5, 21, 28, 36, 165, 220, 1001, 1365, 1820, 8568, 11628, 54264, 74613, 346104, 480700, 657800, 3108105, 4292145, 20160075, 28048800, 38567100, 183579396, 254186856, 1203322288, 1676056044, 7898654920, 11058116888

Offset

0,4

Links

G. C. Greubel, Table of n, a(n) for n = 0..1000

Mathematica

Table[Binomial[Floor[n*Sqrt[2]], n], {n, 0, 50}] (* G. C. Greubel, Aug 17 2018 *)

Prog

(PARI) a(n)=binomial(floor(n*sqrt(2)), n)
(Magma) [Binomial(Floor(n*Sqrt(2)), n): n in [0..50]]; // G. C. Greubel, Aug 17 2018

Crossrefs

Cf. A135965.

Sequence in context: A344950 A344151 A120697 * A099578 A109452 A232665

Adjacent sequences: A135961 A135962 A135963 * A135965 A135966 A135967

Keyword

nonn

Author

Paul D. Hanna, Dec 11 2007

Status

approved