



1, 16, 91, 336, 966, 2352, 5082, 10032, 18447, 32032, 53053, 84448, 129948, 194208, 282948, 403104, 562989, 772464, 1043119, 1388464, 1824130, 2368080, 3040830, 3865680, 4868955, 6080256, 7532721, 9263296
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OFFSET

0,2


REFERENCES

A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pp. 194196.


LINKS

Table of n, a(n) for n=0..27.
Index entries for linear recurrences with constant coefficients, signature (7,21,35,35,21,7,1).


FORMULA

a(n)=C(n+5, 5)*(5n+3)/3.
G.f.: (1+9*x)/(1x)^7.


MATHEMATICA

Nest[Accumulate[#]&, Table[n(n+1)(10n7)/6, {n, 0, 50}], 3] (* Harvey P. Dale, Nov 13 2013 *)


CROSSREFS

Cf. A051880.
Cf. A093645 ((10, 1) Pascal, column m=6).
Sequence in context: A055856 A195591 A240292 * A047674 A153029 A027938
Adjacent sequences: A050403 A050404 A050405 * A050407 A050408 A050409


KEYWORD

easy,nonn


AUTHOR

Barry E. Williams, Dec 21 1999


EXTENSIONS

Corrected by T. D. Noe, Nov 09 2006


STATUS

approved



