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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
OFFSET
0,3
MATHEMATICA
Tanh[ Sin[ x ] ]*Tan[ x ]/2 (* Even Part *)
CROSSREFS
Cf. A009796.
Sequence in context: A212838 A024241 A278684 * A276386 A333023 A171396
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
STATUS
approved