A240322 - cp's OEIS frontend

A240322 Number of n X 2 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

n	a(n)
1	2
2	5
3	17
4	37
5	80
6	213
7	443
8	1028
9	2511
10	5370
11	12742
12	29737
13	65687
14	155443
15	355668
16	803696
17	1883007
18	4285398
19	9805203
20	22760901
21	51853646
22	119272787
23	275149593
24	628629688
25	1447871151
26	3328934761
27	7625189365
28	17555754237
29	40308328871

[2, 5, 17, 37, 80, 213, 443, 1028, 2511, 5370, 12742, 29737, 65687, 155443, 355668, 803696, 1883007, 4285398, 9805203, 22760901, 51853646, 119272787, 275149593, 628629688, 1447871151, 3328934761, 7625189365, 17555754237, 40308328871]

cp's OEIS Frontend

A240322 Number of n X 2 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

List of values