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A064056 Seventh column of quintinomial coefficients. 3

%I #11 May 01 2014 02:44:22

%S 3,19,68,185,426,875,1652,2922,4905,7887,12232,18395,26936,38535,

%T 54008,74324,100623,134235,176700,229789,295526,376211,474444,593150,

%U 735605,905463,1106784,1344063,1622260,1946831

%N Seventh column of quintinomial coefficients.

%F a(n) = A035343(n+2, 6) = binomial(n+2, 2)*(n^4+24*n^3+221*n^2+954*n+1080)/(6!/2!), n >= 0.

%F G.f.: (3-2*x-2*x^2+3*x^3-x^4)/(1-x)^7; numerator polynomial is N5(6, x) from the array A063422.

%F a(n) = 3*C(n+2,2) + 10*C(n+2,3) + 10*C(n+2,4) + 5*C(n+2,5) + C(n+2,6) (see comment in A213887). - _Vladimir Shevelev_ and _Peter J. C. Moses_, Jun 22 2012

%Y Cf. A027659 (sixth column).

%K nonn,easy

%O 0,1

%A _Wolfdieter Lang_, Aug 29 2001

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Last modified April 23 11:35 EDT 2024. Contains 371912 sequences. (Running on oeis4.)