

A107419


C(n+4,4)*C(n+7,7).


1



1, 40, 540, 4200, 23100, 99792, 360360, 1132560, 3185325, 8179600, 19467448, 43439760, 91706160, 184497600, 355816800, 661028544, 1187785665, 2071432440, 3516320500, 5824819000, 9436206780, 14978106000, 23333661000, 35728290000, 53840548125, 79942445856
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OFFSET

0,2


LINKS

T. D. Noe, Table of n, a(n) for n = 0..1000


EXAMPLE

If n=0 then C(0+4,4)*C(0+7,7)= C(4,4)*C(7,7)=1*1=1
If n=6 then C(6+4,4)*C(6+7,7)=C(10,4)*C(13,7)=210*1716=360360


PROG

(PARI) for(n=0, 29, print1(binomial(n+4, 4)*binomial(n+7, 7), ", "))


CROSSREFS

Cf. A062145.
Sequence in context: A093744 A109105 A247409 * A159946 A185744 A097823
Adjacent sequences: A107416 A107417 A107418 * A107420 A107421 A107422


KEYWORD

easy,nonn


AUTHOR

Zerinvary Lajos, May 26 2005


EXTENSIONS

Corrected and extended by Rick L. Shepherd, May 27 2005


STATUS

approved



