A024248 Expansion of sin(tan(x)*x)/2.

0, 1, 4, -12, -2272, -166960, -13136448, -1177426880, -116571720704, -11452654888704, -669616618900480, 214088681811547136, 155062926684742508544, 76744341986122463531008, 36379718195920790292840448

Offset

0,3

Links

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

Mathematica

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

Crossrefs

Cf. A009515.

Sequence in context: A009516 A266500 A146210 * A130539 A156823 A212256

Adjacent sequences: A024245 A024246 A024247 * A024249 A024250 A024251

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs Mar 1997

Status

approved