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.

A185535 1/6 the number of n X 2 0..5 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 11
3 110
4 1155
5 12105
6 127190
7 1336205
8 14039455
9 147510990
10 1549891055
11 16284627805
12 171101820790
13 1797758782905
14 18888967243155
15 198465493076590
16 2085267630701755
17 21909809227375505
18 230205338311698390

List of values

[1, 11, 110, 1155, 12105, 127190, 1336205, 14039455, 147510990, 1549891055, 16284627805, 171101820790, 1797758782905, 18888967243155, 198465493076590, 2085267630701755, 21909809227375505, 230205338311698390]

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

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