A241284 - cp's OEIS frontend

A241284 Number of 2Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one 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	4
2	3
3	5
4	13
5	17
6	35
7	90
8	141
9	288
10	670
11	1101
12	2265
13	4995
14	8474
15	17477
16	37329
17	64894
18	133967
19	279966
20	496683
21	1023868
22	2105032
23	3799717
24	7810452
25	15858460
26	29052053
27	59504463
28	119660776
29	221989407
30	452920894
31	904106577
32	1695187559
33	3445124586

[4, 3, 5, 13, 17, 35, 90, 141, 288, 670, 1101, 2265, 4995, 8474, 17477, 37329, 64894, 133967, 279966, 496683, 1023868, 2105032, 3799717, 7810452, 15858460, 29052053, 59504463, 119660776, 221989407, 452920894, 904106577, 1695187559, 3445124586]

cp's OEIS Frontend

A241284 Number of 2Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one 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