A009656 Expansion of tan(sin(log(1+x))).

0, 1, -1, 3, -12, 56, -300, 1712, -9296, 31580, 332820, -12153628, 262379568, -5078814272, 95841606224, -1814643998048, 34867500286080, -682633762485424, 13618529773949232, -276121278370253456, 5659794902282891840

Offset

0,4

Links

Table of n, a(n) for n=0..20.

Mathematica

Tan[ Sin[ Log[ 1+x ] ] ]

Crossrefs

Sequence in context: A027390 A349513 A009499 * A020016 A001277 A334773

Adjacent sequences: A009653 A009654 A009655 * A009657 A009658 A009659

Keyword

sign,easy

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved