A004370 Binomial coefficient C(7n,n-2).

1, 21, 378, 6545, 111930, 1906884, 32468436, 553270671, 9440350920, 161322559475, 2761025887620, 47325339895743, 812325612855848, 13961746143269400, 240260199935164200, 4139207762053520646

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

Table of n, a(n) for n=2..17.

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].

Mathematica

Table[Binomial[7n, n-2], {n, 2, 20}] (* Harvey P. Dale, Mar 16 2012 *)

Crossrefs

Sequence in context: A218763 A181364 A134494 * A001881 A240683 A108740

Adjacent sequences: A004367 A004368 A004369 * A004371 A004372 A004373

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved