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.

A207737 Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.

Table of values

n a(n)
1 9
2 81
3 361
4 1849
5 10201
6 58081
7 335241
8 1946025
9 11323225
10 65950641
11 384277609
12 2239466329
13 13051920025
14 76070604481
15 443368207881
16 2584130195529
17 15061392571801
18 87784176001041
19 511643544572521
20 2982076804476025

List of values

[9, 81, 361, 1849, 10201, 58081, 335241, 1946025, 11323225, 65950641, 384277609, 2239466329, 13051920025, 76070604481, 443368207881, 2584130195529, 15061392571801, 87784176001041, 511643544572521, 2982076804476025]

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

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