A240041 - cp's OEIS frontend

A240041 Number of nX2 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 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	10
4	22
5	50
6	119
7	276
8	637
9	1473
10	3355
11	7682
12	17497
13	39777
14	90406
15	205111
16	465359
17	1054871
18	2390302
19	5415591
20	12265608
21	27777095
22	62895884
23	142401878
24	322392952
25	729835421
26	1652150714
27	3739914222
28	8465684665
29	19162662378
30	43375394510

[2, 4, 10, 22, 50, 119, 276, 637, 1473, 3355, 7682, 17497, 39777, 90406, 205111, 465359, 1054871, 2390302, 5415591, 12265608, 27777095, 62895884, 142401878, 322392952, 729835421, 1652150714, 3739914222, 8465684665, 19162662378, 43375394510]

cp's OEIS Frontend

A240041 Number of nX2 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 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