cp's OEIS Frontend

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.

A159725 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 5 local maxima.

Original entry on oeis.org

0, 0, 0, 45888, 72621240, 44981038296, 18389612809680, 6040299916376448, 1749772454946512832, 469799260595276780160, 120267085682566659944448, 29853755210933389459501056, 7260112922454133870956552192, 1740894557985015492853351907328, 413292356519150082930093737902080
Offset: 1

Views

Author

R. H. Hardin, Apr 20 2009

Keywords

Crossrefs

Programs

  • PARI
    \\ CircPeaksBySig defined in A334778.
    a(n) = {CircPeaksBySig(vector(n, i, 3), [5])[1]} \\ Andrew Howroyd, May 14 2020

Extensions

Terms a(8) and beyond from Andrew Howroyd, May 14 2020