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A diagonal of A059419.
3

%I #5 Mar 31 2012 13:20:04

%S 1,20,616,28160,1805056,154918400,17171485696,2389096202240,

%T 407776690241536,83793407533383680,20407552701432856576,

%U 5813146553630295326720,1914890082050142493474816

%N A diagonal of A059419.

%D L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 259.

%F a(n)= A059419(2*n+1, 3). From the expansion of tan(x)^3/6.

%Y Cf. A059419.

%K nonn,easy

%O 1,2

%A _N. J. A. Sloane_, Jan 30 2001

%E More terms from Larry Reeves (larryr(AT)acm.org), Feb 08 2001. Corrected and extended by _Wolfdieter Lang_, Feb 09 2001.