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.

A222902 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

Table of values

n a(n)
1 4
2 25
3 373
4 7794
5 180203
6 4320431
7 105327353
8 2592612272
9 64243363904
10 1600125512239
11 40022606753953
12 1004596097977296
13 25292398905119297
14 638445931307999125
15 16152880969313405490
16 409495374971029069517

List of values

[4, 25, 373, 7794, 180203, 4320431, 105327353, 2592612272, 64243363904, 1600125512239, 40022606753953, 1004596097977296, 25292398905119297, 638445931307999125, 16152880969313405490, 409495374971029069517]

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

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