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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.

A226658 T(n,k)=Number of nXk 0..4 arrays of sums of 2X2 subblocks of some (n+1)X(k+1) binary array.

Table of values

n a(n)
1 5
2 19
3 19
4 65
5 205
6 65
7 211
8 1795
9 1795
10 211
11 665
12 14221
13 36317
14 14221
15 665
16 2059
17 106819
18 636331
19 636331
20 106819
21 2059
22 6305
23 778765
24 10365005
25 23679901
26 10365005
27 778765
28 6305
29 19171
30 5581315
31 162470155
32 805351531
33 805351531
34 162470155

List of values

[5, 19, 19, 65, 205, 65, 211, 1795, 1795, 211, 665, 14221, 36317, 14221, 665, 2059, 106819, 636331, 636331, 106819, 2059, 6305, 778765, 10365005, 23679901, 10365005, 778765, 6305, 19171, 5581315, 162470155, 805351531, 805351531, 162470155]

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

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