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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.

A186553 T(n,k)=1/8192 the number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace.

Table of values

n a(n)
1 0
2 290
3 290
4 2972
5 19016
6 2972
7 168200
8 1279862
9 1279862
10 168200
11 3090668
12 88662978
13 177942264
14 88662978
15 3090668
16 111188198
17 6215002266
18 31976088817
19 31976088817
20 6215002266
21 111188198
22 2585394080
23 435599518160
24 5253540132125

List of values

[0, 290, 290, 2972, 19016, 2972, 168200, 1279862, 1279862, 168200, 3090668, 88662978, 177942264, 88662978, 3090668, 111188198, 6215002266, 31976088817, 31976088817, 6215002266, 111188198, 2585394080, 435599518160, 5253540132125]

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

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