A059368 - OEIS

%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