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.

A301953 Number of 4Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 0
2 13
3 83
4 947
5 9084
6 98839
7 1029960
8 10839822
9 113808922
10 1195709047
11 12560090528
12 131941626696
13 1386007798945
14 14559641418947
15 152945061251677
16 1606646289820269
17 16877382303769959
18 177292310984136323

List of values

[0, 13, 83, 947, 9084, 98839, 1029960, 10839822, 113808922, 1195709047, 12560090528, 131941626696, 1386007798945, 14559641418947, 152945061251677, 1606646289820269, 16877382303769959, 177292310984136323]

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

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