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.

A188400 Number of (6*n) X 6 binary arrays with rows in nonincreasing order, n ones in every column and no more than 2 ones in any row.

Table of values

n a(n)
0 1
1 76
2 2578
3 44288
4 478711
5 3710272
6 22393101
7 111200600
8 472211360
9 1763603560
10 5916521021
11 18121655192
12 51328536740
13 135834620472
14 338676787932
15 801091475448
16 1808025242415
17 3912600581712
18 8152010122276
19 16411466716600
20 32022153082291
21 60720959942432
22 112158519503545

List of values

[1, 76, 2578, 44288, 478711, 3710272, 22393101, 111200600, 472211360, 1763603560, 5916521021, 18121655192, 51328536740, 135834620472, 338676787932, 801091475448, 1808025242415, 3912600581712, 8152010122276, 16411466716600, 32022153082291, 60720959942432, 112158519503545]

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

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