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.

A159730 Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 4 local maxima.

Table of values

n a(n)
1 0
2 2
3 15042
4 18059184
5 11195742340
6 5293792219344
7 2205450812336100
8 861515212667884608
9 324837276666570610668
10 119915580982794765091280
11 43656420088142545411963444
12 15735834864508561392982184160
13 5628506716816811122561964710428
14 2000722502787397537117555256499248

List of values

[0, 2, 15042, 18059184, 11195742340, 5293792219344, 2205450812336100, 861515212667884608, 324837276666570610668, 119915580982794765091280, 43656420088142545411963444, 15735834864508561392982184160, 5628506716816811122561964710428, 2000722502787397537117555256499248]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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