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.

A222372 Number of nX1 0..3 arrays with no more than floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

Table of values

n a(n)
1 1
2 1
3 1
4 4
5 5
6 14
7 17
8 75
9 95
10 411
11 519
12 2522
13 3211
14 15919
15 20299
16 103627
17 132515
18 683480
19 875491
20 4554799
21 5844093
22 30542304
23 39239961
24 205785953
25 264702489
26 1391485044
27 1791699029
28 9436529666
29 12161620195
30 64150640719
31 82742154707

List of values

[1, 1, 1, 4, 5, 14, 17, 75, 95, 411, 519, 2522, 3211, 15919, 20299, 103627, 132515, 683480, 875491, 4554799, 5844093, 30542304, 39239961, 205785953, 264702489, 1391485044, 1791699029, 9436529666, 12161620195, 64150640719, 82742154707]

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

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