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.

A241439 Number of 5Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.

Table of values

n a(n)
1 10
2 5
3 213
4 1527
5 7495
6 45139
7 282527
8 1304136
9 6927135
10 38853440
11 200272321
12 1132678898
13 5723582863
14 30244411692
15 173971301354
16 925680108718
17 4907967973500
18 27426461921699
19 147827882275389

List of values

[10, 5, 213, 1527, 7495, 45139, 282527, 1304136, 6927135, 38853440, 200272321, 1132678898, 5723582863, 30244411692, 173971301354, 925680108718, 4907967973500, 27426461921699, 147827882275389]