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Partial sums of A050484.
2

%I #16 Jun 13 2015 00:50:04

%S 1,13,81,345,1155,3267,8151,18447,38610,75790,140998,250614,428298,

%T 707370,1133730,1769394,2696727,4023459,5888575,8469175,11988405,

%U 16724565,23021505,31300425

%N Partial sums of A050484.

%D A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pp. 194-196.

%D Murray R.Spiegel, Calculus of Finite Differences and Difference Equations, "Schaum's Outline Series", McGraw-Hill, 1971, pp. 10-20, 79-94.

%H <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (9,-36,84,-126,126,-84,36,-9,1).

%F a(n) = (5n+8)*C(n+7, 7)/8.

%F G.f.: (1+4*x)/(1-x)^9.

%Y Cf. A050484.

%Y Cf. A093562 ((5, 1) Pascal, column m=8).

%K easy,nonn

%O 0,2

%A _Barry E. Williams_, Feb 02 2000