A240047 - cp's OEIS frontend

A240047 Number of 2Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero 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.

n	a(n)
1	2
2	4
3	9
4	20
5	33
6	76
7	117
8	232
9	398
10	675
11	1228
12	2002
13	3548
14	5935
15	10128
16	17287
17	28967
18	49649
19	83130
20	141412
21	238567
22	402406
23	681948
24	1147552
25	1943230
26	3275448
27	5532679
28	9343794
29	15759620
30	26629572
31	44915334
32	75854561
33	128021118
34	216075045

[2, 4, 9, 20, 33, 76, 117, 232, 398, 675, 1228, 2002, 3548, 5935, 10128, 17287, 28967, 49649, 83130, 141412, 238567, 402406, 681948, 1147552, 1943230, 3275448, 5532679, 9343794, 15759620, 26629572, 44915334, 75854561, 128021118, 216075045]

cp's OEIS Frontend

A240047 Number of 2Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero 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

List of values