The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A009489 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A009489

Expansion of sin(sinh(tan(x))).
(history; published version)

#17 by Jon E. Schoenfield at Sat Apr 01 15:44:16 EDT 2017

STATUS

editing

approved

#16 by Jon E. Schoenfield at Sat Apr 01 15:44:13 EDT 2017

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997.

STATUS

approved

editing

#15 by N. J. A. Sloane at Sat Apr 01 07:24:19 EDT 2017

EXTENSIONS

Extended with signs Mar 15 1997 by Olivier Gérard, Mar 15 1997.

Discussion

Sat Apr 01

07:24

OEIS Server: https://oeis.org/edit/global/2624

#14 by Michael Somos at Wed Nov 23 14:03:55 EST 2016

STATUS

reviewed

approved

#13 by Robert G. Wilson v at Wed Nov 23 13:04:30 EST 2016

STATUS

proposed

reviewed

#12 by G. C. Greubel at Wed Nov 23 12:55:30 EST 2016

STATUS

editing

proposed

#11 by G. C. Greubel at Wed Nov 23 02:35:51 EST 2016

MATHEMATICA

Take[Table[n!*SeriesCoefficient[Sin[Sinh[Tan[x]]], {x, 0, n}], {n, 0, 15}], {2, -1, 2}] (* G. C. Greubel, Nov 23 2016 *)

STATUS

proposed

editing

#10 by Robert Israel at Wed Nov 23 02:01:57 EST 2016

STATUS

editing

proposed

#9 by Robert Israel at Wed Nov 23 02:01:12 EST 2016

LINKS

Robert Israel, <a href="/A009489/b009489.txt">Table of n, a(n) for n = 0..234</a>

FORMULA

sin(sinh(tan(x))) = Sum_{n>=0} a(n)*x^(2*n+1)/(2*n+1)!. - Robert Israel, Nov 23 2016

MAPLE

S:= series(sin(sinh(tan(x))), x, 51):

seq(coeff(S, x, j)*j!, j=1..49, 2); # Robert Israel, Nov 23 2016

STATUS

approved

editing

#8 by N. J. A. Sloane at Mon Jan 27 09:12:53 EST 2014

EXTENSIONS

Extended with signs Mar 15 1997 by _Olivier GerardGérard_.

Discussion

Mon Jan 27

09:12

OEIS Server: https://oeis.org/edit/global/2111