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.

A159731 Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 5 local maxima.

Table of values

n a(n)
1 0
2 0
3 2988
4 27458352
5 61383379820
6 81667937763552
7 85059308335953056
8 77970400876665940256
9 66589111000653219026676
10 54577055338226000658293040
11 43623618238133057304530730072
12 34310058645060995324654729060496
13 26688777245272247361239042667969036

List of values

[0, 0, 2988, 27458352, 61383379820, 81667937763552, 85059308335953056, 77970400876665940256, 66589111000653219026676, 54577055338226000658293040, 43623618238133057304530730072, 34310058645060995324654729060496, 26688777245272247361239042667969036]

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

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