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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.

A056079 Number of 7 X 7 binary matrices with n ones, with no zero rows or columns, up to row and column permutation.

Table of values

n a(n)
7 1
8 2
9 15
10 79
11 420
12 1744
13 6197
14 18715
15 50042
16 118121
17 250025
18 475791
19 820987
20 1287695
21 1845875
22 2423114
23 2923474
24 3246721
25 3327677
26 3150758
27 2761802
28 2242711
29 1690526
30 1183725
31 771951
32 469281
33 267108
34 142542
35 71844
36 34271
37 15685
38 6861
39 2948
40 1223
41 513
42 209
43 90
44 34
45 16
46 6
47 3
48 1
49 1

List of values

[1, 2, 15, 79, 420, 1744, 6197, 18715, 50042, 118121, 250025, 475791, 820987, 1287695, 1845875, 2423114, 2923474, 3246721, 3327677, 3150758, 2761802, 2242711, 1690526, 1183725, 771951, 469281, 267108, 142542, 71844, 34271, 15685, 6861, 2948, 1223, 513, 209, 90, 34, 16, 6, 3, 1, 1]

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

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