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.

A216462 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of a 4Xn array with new integer colors introduced in row major order.

Table of values

n a(n)
1 2
2 5
3 20
4 203
5 3429
6 83440
7 2711768
8 112073062
9 5691327040
10 346212384169
11 24737419691764
12 2043836452962923
13 192779435018929754
14 20538493062072286871
15 2449347793873500266618
16 324446721789278481458200

List of values

[2, 5, 20, 203, 3429, 83440, 2711768, 112073062, 5691327040, 346212384169, 24737419691764, 2043836452962923, 192779435018929754, 20538493062072286871, 2449347793873500266618, 324446721789278481458200]

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

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