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.

A215562 Number of permutations of n indistinguishable copies of 1..4 with every partial sum <= the same partial sum averaged over all permutations.

Table of values

n a(n)
0 1
1 7
2 403
3 40350
4 5223915
5 783353872
6 129141898872
7 22745605840236
8 4206489449301315
9 807660192541534200
10 159752979289765273698
11 32371149339259024610992
12 6692030708288364864188400
13 1406943391115083641966787200
14 300084647544974128326709244080

List of values

[1, 7, 403, 40350, 5223915, 783353872, 129141898872, 22745605840236, 4206489449301315, 807660192541534200, 159752979289765273698, 32371149339259024610992, 6692030708288364864188400, 1406943391115083641966787200, 300084647544974128326709244080]

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

Content is available under The OEIS End-User License Agreement.