A239851 - cp's OEIS frontend

A239851 Number of n X 1 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 or one plus the sum of the elements antidiagonally to its northeast, modulo 4.

n	a(n)
1	2
2	2
3	4
4	6
5	8
6	14
7	20
8	30
9	48
10	70
11	108
12	166
13	248
14	382
15	580
16	878
17	1344
18	2038
19	3100
20	4726
21	7176
22	10926
23	16628
24	25278
25	38480
26	58534
27	89036
28	135494
29	206104
30	313566
31	477092
32	725774
33	1104224
34	1679958
35	2555772
36	3888406
37	5915688
38	8999950
39	13692500

[2, 2, 4, 6, 8, 14, 20, 30, 48, 70, 108, 166, 248, 382, 580, 878, 1344, 2038, 3100, 4726, 7176, 10926, 16628, 25278, 38480, 58534, 89036, 135494, 206104, 313566, 477092, 725774, 1104224, 1679958, 2555772, 3888406, 5915688, 8999950, 13692500]

cp's OEIS Frontend

A239851 Number of n X 1 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 or one plus the sum of the elements antidiagonally to its northeast, modulo 4.

Table of values

List of values