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.

A240790 Number of n X 3 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

Table of values

n a(n)
1 4
2 5
3 8
4 27
5 49
6 50
7 89
8 115
9 182
10 289
11 425
12 651
13 992
14 1486
15 2255
16 3349
17 5040
18 7706
19 11754
20 17525
21 26365
22 39661
23 59893
24 89903
25 135336
26 203491
27 306233
28 460867
29 692971
30 1040765
31 1565790
32 2353754
33 3540545
34 5319995
35 8000324
36 12027862
37 18084789

List of values

[4, 5, 8, 27, 49, 50, 89, 115, 182, 289, 425, 651, 992, 1486, 2255, 3349, 5040, 7706, 11754, 17525, 26365, 39661, 59893, 89903, 135336, 203491, 306233, 460867, 692971, 1040765, 1565790, 2353754, 3540545, 5319995, 8000324, 12027862, 18084789]