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.

A240195 Number of 5Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or three plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

n a(n)
1 7
2 73
3 680
4 7170
5 91879
6 1399773
7 22849697
8 385366572
9 6605282704
10 114179317079
11 1982427469366
12 34498669503396
13 601074631406014
14 10479195138240937
15 182755667269396463
16 3187784517998728377
17 55609182290464067412

List of values

[7, 73, 680, 7170, 91879, 1399773, 22849697, 385366572, 6605282704, 114179317079, 1982427469366, 34498669503396, 601074631406014, 10479195138240937, 182755667269396463, 3187784517998728377, 55609182290464067412]

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

Content is available under The OEIS End-User License Agreement.