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A024248 Expansion of sin(tan(x)*x)/2. 0
0, 1, 4, -12, -2272, -166960, -13136448, -1177426880, -116571720704, -11452654888704, -669616618900480, 214088681811547136, 155062926684742508544, 76744341986122463531008, 36379718195920790292840448 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 17 18:14 EST 2020. Contains 330987 sequences. (Running on oeis4.)