A024274 - OEIS

%I #13 Jun 26 2019 03:04:16

%S 0,1,6,111,4060,239405,20758914,2482982971,391694904056,

%T 78786450217881,19679892395058750,5976596329212898631,

%U 2168616275876397830484,926586406796043293175109,460466053198842720885132858,263333906533368208422923536275

%N Expansion of e.g.f. tan(sinh(x))*x/2 (even powers only).

%t Tan[ Sinh[ x ]]*x/2 (* Even Part *)

%Y Cf. A009683.

%K nonn

%O 0,3

%A _R. H. Hardin_

%E Extended and signs tested Mar 1997.

%E More terms from _Sean A. Irvine_, Jun 26 2019