A240407 - cp's OEIS frontend

A240407 Number of nX2 0..3 arrays with no element equal to zero 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, modulo 4.

n	a(n)
1	2
2	10
3	33
4	139
5	529
6	2105
7	8258
8	32480
9	127944
10	503372
11	1982058
12	7801697
13	30716039
14	120917541
15	476048890
16	1874110143
17	7378197850
18	29046994153
19	114354774523
20	450201581068
21	1772392670851
22	6977710726893
23	27470462435959
24	108148134784975

[2, 10, 33, 139, 529, 2105, 8258, 32480, 127944, 503372, 1982058, 7801697, 30716039, 120917541, 476048890, 1874110143, 7378197850, 29046994153, 114354774523, 450201581068, 1772392670851, 6977710726893, 27470462435959, 108148134784975]

cp's OEIS Frontend

A240407 Number of nX2 0..3 arrays with no element equal to zero 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, modulo 4.

Table of values

List of values