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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.

A197448 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,1,0,0 for x=0,1,2,3,4.

Table of values

n a(n)
1 11
2 321
3 15410
4 585194
5 23829080
6 982926107
7 40087361395
8 1640477445822
9 67160665746869
10 2747685400705119
11 112433629005651948
12 4600917175526994358
13 188267595598497672073
14 7703877269427034462338
15 315242428170240015474340

List of values

[11, 321, 15410, 585194, 23829080, 982926107, 40087361395, 1640477445822, 67160665746869, 2747685400705119, 112433629005651948, 4600917175526994358, 188267595598497672073, 7703877269427034462338, 315242428170240015474340]

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

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