A004357 - OEIS

%I #16 Sep 08 2022 08:44:32

%S 1,18,276,4060,58905,850668,12271512,177100560,2558620845,37014131440,

%T 536211932256,7778680504140,112992892764570,1643385429346680,

%U 23929614612052080,348822899204435040

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

%D 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.

%H Vincenzo Librandi, <a href="/A004357/b004357.txt">Table of n, a(n) for n = 2..870</a>

%H M. Abramowitz and I. A. Stegun, eds., <a href="http://www.convertit.com/Go/ConvertIt/Reference/AMS55.ASP">Handbook of Mathematical Functions</a>, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

%p A004357:=n->binomial(6*n,n-2): seq(A004357(n), n=2..30); # _Wesley Ivan Hurt_, May 26 2015

%t Table[Binomial[6 n, n - 2], {n, 2, 20}] (* _Vincenzo Librandi_, Mar 31 2017 *)

%o (PARI) a(n)=binomial(6*n,n-2) \\ _Charles R Greathouse IV_, May 26 2015

%o (Magma) [Binomial(6*n, n-2): n in [2..30]]; // _Vincenzo Librandi_, Mar 31 2017

%K nonn,easy

%O 2,2

%A _N. J. A. Sloane_