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A024274 Expansion of e.g.f. tan(sinh(x))*x/2 (even powers only). 0
0, 1, 6, 111, 4060, 239405, 20758914, 2482982971, 391694904056, 78786450217881, 19679892395058750, 5976596329212898631, 2168616275876397830484, 926586406796043293175109, 460466053198842720885132858, 263333906533368208422923536275 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..15.

MATHEMATICA

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

CROSSREFS

Cf. A009683.

Sequence in context: A272391 A197765 A024273 * A162081 A296949 A009612

Adjacent sequences:  A024271 A024272 A024273 * A024275 A024276 A024277

KEYWORD

nonn

AUTHOR

R. H. Hardin

EXTENSIONS

Extended and signs tested Mar 1997.

More terms from Sean A. Irvine, Jun 26 2019

STATUS

approved

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Last modified October 24 05:38 EDT 2021. Contains 348217 sequences. (Running on oeis4.)