%I #10 Jan 10 2017 08:05:17
%S 1,1,3,3,20,30,15,161,525,525,105,1584,8232,17640,13230,945,18579,
%T 134970,457380,727650,436590
%N Triangle arising from solution to a*x = tan x (next row contains non-integral entries).
%D L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 170, #33.
%e 1;
%e 1, 3;
%e 3, 20, 30;
%e 15, 161, 525, 525;
%e 105, 1584, 8232, 17640, 13230; ...
%Y First diagonal is A001147.
%K nonn,tabl,fini,full
%O 0,3
%A _N. J. A. Sloane_, Jan 28 2001