A239988 - cp's OEIS frontend

A239988 Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

n	a(n)
1	4
2	16
3	56
4	171
5	530
6	1495
7	4059
8	10121
9	23476
10	51169
11	105957
12	210063
13	401043
14	740392
15	1325954
16	2309449
17	3920715
18	6500605
19	10544919
20	16762214
21	26148867
22	40085363
23	60458446
24	89814510
25	131550423
26	190148874
27	271466315
28	383082641
29	534722915

[4, 16, 56, 171, 530, 1495, 4059, 10121, 23476, 51169, 105957, 210063, 401043, 740392, 1325954, 2309449, 3920715, 6500605, 10544919, 16762214, 26148867, 40085363, 60458446, 89814510, 131550423, 190148874, 271466315, 383082641, 534722915]

cp's OEIS Frontend

A239988 Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

List of values