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.

A377062 Number of inequivalent n X 4 nonnegative integer arrays with row sums 4 and column sums n up to permutations of rows and columns.

Table of values

n a(n)
0 1
1 1
2 3
3 9
4 43
5 147
6 661
7 2649
8 10738
9 40427
10 146206
11 498705
12 1625621
13 5049556
14 15044485
15 43044068
16 118731621
17 316347549
18 816409799
19 2044571309
20 4979112445
21 11810405775
22 27331117859
23 61792085482
24 136670650003
25 296071435108
26 628900592847
27 1311195696010
28 2685731232674
29 5409289235300
30 10721363532282

List of values

[1, 1, 3, 9, 43, 147, 661, 2649, 10738, 40427, 146206, 498705, 1625621, 5049556, 15044485, 43044068, 118731621, 316347549, 816409799, 2044571309, 4979112445, 11810405775, 27331117859, 61792085482, 136670650003, 296071435108, 628900592847, 1311195696010, 2685731232674, 5409289235300, 10721363532282]

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

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