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.

A227024 Number of nX5 (0,1,2) arrays of permanents of 2X2 subblocks of some (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

n a(n)
1 25
2 368
3 4948
4 65317
5 786154
6 8379285
7 79224749
8 668706345
9 5081503151
10 35102679286
11 222533536879
12 1305789511714
13 7145426639248
14 36700964912428
15 177929765359899
16 818153315837912
17 3583007628524884
18 14999102522624015

List of values

[25, 368, 4948, 65317, 786154, 8379285, 79224749, 668706345, 5081503151, 35102679286, 222533536879, 1305789511714, 7145426639248, 36700964912428, 177929765359899, 818153315837912, 3583007628524884, 14999102522624015]

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

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