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.

A219412 Unmatched value maps: number of 3 X n binary arrays indicating the locations of corresponding elements not equal to any horizontal or antidiagonal neighbor in a random 0..2 3 X n array.

Table of values

n a(n)
1 1
2 21
3 181
4 1199
5 8173
6 57097
7 398375
8 2773933
9 19314785
10 134507787
11 936720513
12 6523315045
13 45428247915
14 316361693953
15 2203138855813
16 15342630706087
17 106845881585421
18 744073337324881
19 5181717103636911
20 36085410931557557

List of values

[1, 21, 181, 1199, 8173, 57097, 398375, 2773933, 19314785, 134507787, 936720513, 6523315045, 45428247915, 316361693953, 2203138855813, 15342630706087, 106845881585421, 744073337324881, 5181717103636911, 36085410931557557]