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A159277 Ways to write the identity as a product of n 3-cycles in symmetric group S_4. 0
0, 8, 32, 384, 2560, 22528, 172032, 1409024, 11141120, 89653248, 715128832, 5729419264, 45801799680, 366548615168, 2931852050432, 23456963887104, 187647121162240, 1501211329036288, 12009553193336832, 96076975302508544 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..19.

FORMULA

a(n)=(2/3)*(-1)^n*((-8)^n-4^n). o.g.f. (-8x)/(32x^2+4x-1).

a(n)=8*A091904(n). [R. J. Mathar, Jun 28 2009]

CROSSREFS

Sequence in context: A143557 A208824 A034193 * A214539 A140789 A120781

Adjacent sequences:  A159274 A159275 A159276 * A159278 A159279 A159280

KEYWORD

easy,nonn,obsc

AUTHOR

Jacob A. Siehler, Apr 07 2009

EXTENSIONS

Unclear - what is n? - N. J. A. Sloane, Apr 10 2009

Offset corrected by R. J. Mathar, Jun 28 2009

STATUS

approved

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Last modified July 12 15:09 EDT 2020. Contains 335665 sequences. (Running on oeis4.)