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.

A152505 1/10 of the number of permutations of 4 indistinguishable copies of 1..n with exactly 3 local maxima.

Table of values

n a(n)
1 0
2 3
3 1008
4 172573
5 24118698
6 3148308323
7 401420959948
8 50776368194073
9 6405835208453198
10 807454401764399823
11 101751780468757346448
12 12821210170324927605573
13 1615491145485759589239698
14 203552595669637872843811323
15 25647653984634161426074132948

List of values

[0, 3, 1008, 172573, 24118698, 3148308323, 401420959948, 50776368194073, 6405835208453198, 807454401764399823, 101751780468757346448, 12821210170324927605573, 1615491145485759589239698, 203552595669637872843811323, 25647653984634161426074132948]

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

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