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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.

A197197 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4.

Table of values

n a(n)
1 9
2 85
3 621
4 5311
5 42664
6 350711
7 2873141
8 23497244
9 192348965
10 1574634137
11 12888915436
12 105499317727
13 863568784956
14 7068699587730
15 57860690577672
16 473616132534126
17 3876768069957732
18 31733162865254064
19 259750677790161795

List of values

[9, 85, 621, 5311, 42664, 350711, 2873141, 23497244, 192348965, 1574634137, 12888915436, 105499317727, 863568784956, 7068699587730, 57860690577672, 473616132534126, 3876768069957732, 31733162865254064, 259750677790161795]

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

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