cp's OEIS Frontend

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.

A185819 1/5 the number of nX3 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Table of values

n a(n)
1 1
2 76
3 1584
4 49036
5 1266624
6 35446376
7 956312244
8 26231137608
9 714107480512
10 19507209473948
11 532049001583280
12 14521612514267224
13 396222067735245796
14 10812492512879834968
15 295042237941175359056
16 8051107927651445871340

List of values

[1, 76, 1584, 49036, 1266624, 35446376, 956312244, 26231137608, 714107480512, 19507209473948, 532049001583280, 14521612514267224, 396222067735245796, 10812492512879834968, 295042237941175359056, 8051107927651445871340]

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

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