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.

A159724 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 4 local maxima.

Table of values

n a(n)
1 0
2 0
3 144
4 174216
5 57255120
6 11991842928
7 2031699317760
8 307822441390848
9 43794222405754752
10 6002662060069524480
11 803884492717330692096
12 106029178904806181240832
13 13837293346888202240065536
14 1791753662455712320172064768
15 230600676245973342632159477760

List of values

[0, 0, 144, 174216, 57255120, 11991842928, 2031699317760, 307822441390848, 43794222405754752, 6002662060069524480, 803884492717330692096, 106029178904806181240832, 13837293346888202240065536, 1791753662455712320172064768, 230600676245973342632159477760]

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

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