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A004324
Binomial coefficient C(3n,n-6).
1
1, 21, 276, 2925, 27405, 237336, 1947792, 15380937, 118030185, 886163135, 6540715896, 47626016970, 343006888770, 2448296039700, 17345898649800, 122131734269895, 855420636763836, 5964720367660956
OFFSET
6,2
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
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[3n, n-6], {n, 6, 30}] (* Harvey P. Dale, Oct 20 2015 *)
CROSSREFS
Sequence in context: A022745 A225967 A334529 * A243421 A028053 A223996
KEYWORD
nonn,easy
STATUS
approved