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A118353 Semi-diagonal (two rows below central terms) of pendular triangle A118350 and equal to the self-convolution cube of the central terms (A118351). 4

%I

%S 1,3,21,163,1353,11760,105681,973953,9154821,87428388,845894700,

%T 8273978100,81682757317,812829371205,8144563709391,82104333340467,

%U 832125695906313,8473862660311392,86661931504395228,889705959333345756

%N Semi-diagonal (two rows below central terms) of pendular triangle A118350 and equal to the self-convolution cube of the central terms (A118351).

%o (PARI) {a(n)=polcoeff((serreverse(x*(1-3*x+sqrt((1-3*x)*(1-7*x)+x*O(x^n)))/2/(1-3*x))/x)^3,n)}

%Y Cf. A118350, A118351, A118352, A118354.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Apr 26 2006

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Last modified January 29 14:07 EST 2020. Contains 331338 sequences. (Running on oeis4.)