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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.

A377004 Number of inequivalent 2*n X 8 binary arrays with row sums 4 and column sums n up to row and column permutations.

Table of values

n a(n)
0 1
1 1
2 4
3 19
4 194
5 3144
6 65548
7 1272696
8 21855504
9 328629713
10 4362818853
11 51658865022
12 551021529952
13 5342121192394
14 47446872310092
15 388746259849648
16 2956322263908194
17 20980847841062062
18 139630332607991630
19 875184633222730558
20 5186438905325403553

List of values

[1, 1, 4, 19, 194, 3144, 65548, 1272696, 21855504, 328629713, 4362818853, 51658865022, 551021529952, 5342121192394, 47446872310092, 388746259849648, 2956322263908194, 20980847841062062, 139630332607991630, 875184633222730558, 5186438905325403553]

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

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