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.

A219422 Unchanging value maps: number of 2 X n binary arrays indicating the locations of corresponding elements unequal to no horizontal or antidiagonal neighbor in a random 0..2 2 X n array.

Table of values

n a(n)
1 1
2 7
3 20
4 57
5 160
6 454
7 1292
8 3676
9 10452
10 29724
11 84548
12 240480
13 683968
14 1945348
15 5533040
16 15737260
17 44760324
18 127308564
19 362094824
20 1029880752
21 2929216636
22 8331363064
23 23696305892
24 67397723860
25 191694568548
26 545223274608

List of values

[1, 7, 20, 57, 160, 454, 1292, 3676, 10452, 29724, 84548, 240480, 683968, 1945348, 5533040, 15737260, 44760324, 127308564, 362094824, 1029880752, 2929216636, 8331363064, 23696305892, 67397723860, 191694568548, 545223274608]

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

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