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A024242 Expansion of tanh(sin(x))*tan(x)/2. 0
0, 1, -2, 99, -2244, 182917, -13166918, 1774050663, -260505887880, 54800178181129, -13318656715497866, 4113991096987284843, -1477277623649109678924, 635278235733490892072077, -314450515401786039971942606 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..14.

MATHEMATICA

Tanh[ Sin[ x ] ]*Tan[ x ]/2 (* Even Part *)

CROSSREFS

Cf. A009796.

Sequence in context: A212838 A024241 A278684 * A276386 A171396 A202945

Adjacent sequences:  A024239 A024240 A024241 * A024243 A024244 A024245

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs Mar 1997

STATUS

approved

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Last modified July 22 21:31 EDT 2019. Contains 325227 sequences. (Running on oeis4.)