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.

A227384 Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of one, with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

n a(n)
1 6
2 56
3 587
4 6160
5 61127
6 550010
7 4450124
8 32473856
9 215116595
10 1303420926
11 7278846827
12 37731073135
13 182726436203
14 831526393503
15 3573916903775
16 14573693121509
17 56609147953260
18 210199678971798
19 748463901892529

List of values

[6, 56, 587, 6160, 61127, 550010, 4450124, 32473856, 215116595, 1303420926, 7278846827, 37731073135, 182726436203, 831526393503, 3573916903775, 14573693121509, 56609147953260, 210199678971798, 748463901892529]

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

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