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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.

A196145 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4.

Table of values

n a(n)
1 17
2 123
3 178
4 865
5 2781
6 7486
7 24615
8 85533
9 266059
10 866323
11 2817802
12 9024682
13 29161693
14 94823673
15 306912929
16 992919095
17 3216924395
18 10417479713
19 33734415945
20 109304966265
21 354134153161
22 1147139951832
23 3716343382506

List of values

[17, 123, 178, 865, 2781, 7486, 24615, 85533, 266059, 866323, 2817802, 9024682, 29161693, 94823673, 306912929, 992919095, 3216924395, 10417479713, 33734415945, 109304966265, 354134153161, 1147139951832, 3716343382506]

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

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