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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.

A185521 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock singular.

Table of values

n a(n)
1 31
2 143
3 143
4 593
5 1489
6 593
7 2553
8 12361
9 12361
10 2553
11 10847
12 115979
13 154561
14 115979
15 10847
16 46303
17 1058503
18 2490449
19 2490449
20 1058503
21 46303
22 197329
23 9856209
24 35659489
25 80761059
26 35659489
27 9856209
28 197329
29 841449
30 91539073
31 541370505

List of values

[31, 143, 143, 593, 1489, 593, 2553, 12361, 12361, 2553, 10847, 115979, 154561, 115979, 10847, 46303, 1058503, 2490449, 2490449, 1058503, 46303, 197329, 9856209, 35659489, 80761059, 35659489, 9856209, 197329, 841449, 91539073, 541370505]

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

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