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.

A365961 Number of (0,1)-matrices with sum of entries equal to n and no zero rows or columns, with weakly decreasing row sums.

Table of values

n a(n)
0 1
1 1
2 4
3 19
4 127
5 967
6 9063
7 94595
8 1139708
9 15118010
10 223571836
11 3597458356
12 63233950081
13 1197193320701
14 24418765771835
15 532015160784016
16 12363381055074017
17 304754656068754421
18 7952728315095555279
19 218848562411197549582
20 6338152295627215890669
21 192627799720153909693048

List of values

[1, 1, 4, 19, 127, 967, 9063, 94595, 1139708, 15118010, 223571836, 3597458356, 63233950081, 1197193320701, 24418765771835, 532015160784016, 12363381055074017, 304754656068754421, 7952728315095555279, 218848562411197549582, 6338152295627215890669, 192627799720153909693048]

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

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