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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.

A185777 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

Table of values

n a(n)
1 81
2 558
3 558
4 3844
5 7074
6 3844
7 26784
8 89118
9 89118
10 26784
11 186624
12 1151346
13 2046098
14 1151346
15 186624
16 1296000
17 14837270
18 48744342
19 48744342
20 14837270
21 1296000
22 9000000
23 190416934
24 1154712762
25 2171002788
26 1154712762
27 190416934

List of values

[81, 558, 558, 3844, 7074, 3844, 26784, 89118, 89118, 26784, 186624, 1151346, 2046098, 1151346, 186624, 1296000, 14837270, 48744342, 48744342, 14837270, 1296000, 9000000, 190416934, 1154712762, 2171002788, 1154712762, 190416934]

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

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