This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A159277 #15 Feb 22 2024 02:14:18 %S A159277 1,0,8,32,384,2560,22528,172032,1409024,11141120,89653248,715128832, %T A159277 5729419264,45801799680,366548615168,2931852050432,23456963887104, %U A159277 187647121162240,1501211329036288,12009553193336832,96076975302508544 %N A159277 Ways to write the identity as a product of n 3-cycles in symmetric group S_4. %H A159277 Flavien Mabilat, <a href="https://arxiv.org/abs/2402.09968">Some counting formulas for λ-quiddities over the rings Z / 2^m Z</a>, arXiv:2402.09968 [math.CO], 2024. %F A159277 a(n+1) = (2/3)*(-1)^n*((-8)^n-4^n). %F A159277 O.g.f.: 1 - 8*x^2/(32*x^2+4*x-1). %F A159277 a(n) = 8 * A091904(n-1). - _R. J. Mathar_, Jun 28 2009 %Y A159277 Cf. A091904. %K A159277 easy,nonn %O A159277 0,3 %A A159277 _Jacob A. Siehler_, Apr 07 2009 %E A159277 Offset corrected by _R. J. Mathar_, Jun 28 2009 %E A159277 Offset changed back and a(0) = 1 prepended by _Andrey Zabolotskiy_, Feb 21 2024