A252831 - cp's OEIS frontend

A252831 Number of n X 3 nonnegative integer arrays with upper left 0 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.

n	a(n)
1	4
2	13
3	44
4	127
5	288
6	529
7	850
8	1251
9	1732
10	2293
11	2934
12	3655
13	4456
14	5337
15	6298
16	7339
17	8460
18	9661
19	10942
20	12303
21	13744
22	15265
23	16866
24	18547
25	20308
26	22149
27	24070
28	26071
29	28152
30	30313
31	32554
32	34875
33	37276
34	39757
35	42318
36	44959
37	47680
38	50481
39	53362
40	56323

[4, 13, 44, 127, 288, 529, 850, 1251, 1732, 2293, 2934, 3655, 4456, 5337, 6298, 7339, 8460, 9661, 10942, 12303, 13744, 15265, 16866, 18547, 20308, 22149, 24070, 26071, 28152, 30313, 32554, 34875, 37276, 39757, 42318, 44959, 47680, 50481, 53362, 56323]

cp's OEIS Frontend

A252831 Number of n X 3 nonnegative integer arrays with upper left 0 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.

Table of values

List of values