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A111781 Eighth column (m=7) of unsigned triangle A111595. 0

%I #3 Oct 12 2012 14:40:23

%S 1,56,2052,63000,1777050,48149640,1284709140,34260506280,921799753875,

%T 25175488338000,700755564108600,19932553764723600,580406741946731700,

%U 17320767850295910000,530112107596146075000,16645556950225160958000

%N Eighth column (m=7) of unsigned triangle A111595.

%F E.g.f. (1/sqrt(1-x^2))*((x/(1-x))^7)/7!.

%F a(n)=(n!/7!)*sum(binomial(2*k, k)*binomial(n-2*k-1, 6)/(4^k), k=0..floor((n-7)/2)), n>=7.

%K nonn,easy

%O 7,2

%A _Wolfdieter Lang_, Aug 23 2005

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Last modified August 19 13:17 EDT 2024. Contains 375302 sequences. (Running on oeis4.)