A229440 - cp's OEIS frontend

A229440 Number of n X 3 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing.

n	a(n)
1	5
2	10
3	22
4	53
5	128
6	293
7	625
8	1244
9	2327
10	4124
11	6976
12	11335
13	17786
14	27071
15	40115
16	58054
17	82265
18	114398
19	156410
20	210601
21	279652
22	366665
23	475205
24	609344
25	773707
26	973520
27	1214660
28	1503707
29	1847998
30	2255683
31	2735783
32	3298250
33	3954029
34	4715122

[5, 10, 22, 53, 128, 293, 625, 1244, 2327, 4124, 6976, 11335, 17786, 27071, 40115, 58054, 82265, 114398, 156410, 210601, 279652, 366665, 475205, 609344, 773707, 973520, 1214660, 1503707, 1847998, 2255683, 2735783, 3298250, 3954029, 4715122]

cp's OEIS Frontend

A229440 Number of n X 3 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing.

Table of values

List of values