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.

A227164 Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of one or less, with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

n a(n)
1 6
2 66
3 558
4 4528
5 37012
6 283430
7 2010569
8 13174529
9 79606861
10 445291143
11 2319506105
12 11318251449
13 52022806997
14 226357815317
15 936451009248
16 3697654793472
17 13982230433991
18 50782778554993
19 177615062917012

List of values

[6, 66, 558, 4528, 37012, 283430, 2010569, 13174529, 79606861, 445291143, 2319506105, 11318251449, 52022806997, 226357815317, 936451009248, 3697654793472, 13982230433991, 50782778554993, 177615062917012]

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

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