A004357 a(n) = binomial(6*n,n-2).

1, 18, 276, 4060, 58905, 850668, 12271512, 177100560, 2558620845, 37014131440, 536211932256, 7778680504140, 112992892764570, 1643385429346680, 23929614612052080, 348822899204435040

Offset

2,2

References

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 828.

Links

Vincenzo Librandi, Table of n, a(n) for n = 2..870

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

Maple

A004357:=n->binomial(6*n, n-2): seq(A004357(n), n=2..30); # Wesley Ivan Hurt, May 26 2015

Mathematica

Table[Binomial[6 n, n - 2], {n, 2, 20}] (* Vincenzo Librandi, Mar 31 2017 *)

Prog

(PARI) a(n)=binomial(6*n, n-2) \\ Charles R Greathouse IV, May 26 2015
(Magma) [Binomial(6*n, n-2): n in [2..30]]; // Vincenzo Librandi, Mar 31 2017

Crossrefs

Sequence in context: A083445 A159740 A115903 * A249598 A245924 A368526

Adjacent sequences: A004354 A004355 A004356 * A004358 A004359 A004360

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved