A295449 a(n) = (12*n)!*(2*n)!/((7*n)!*(4*n)!*(3*n)!).

1, 1320, 5883768, 30159472200, 163806801888376, 918503902622731320, 5255426168361638299800, 30493180338359901231171960, 178749192506567211692013235320, 1056050334837831740009828413441344, 6277811703390706059233733243310089768, 37506272066153520595120781707670683894800, 225005811874654647839031201018894323892255640

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Formula

G.f.: hypergeom([1/12, 1/6, 5/12, 1/2, 7/12, 5/6, 11/12], [1/7, 2/7, 3/7, 4/7, 5/7, 6/7], 5159780352/823543*x).

Crossrefs

Cf. A295431.

Sequence in context: A161586 A350612 A013641 * A092088 A068302 A139666

Adjacent sequences: A295446 A295447 A295448 * A295450 A295451 A295452

Keyword

nonn

Author

Gheorghe Coserea, Nov 27 2017

Status

approved