A229422 - cp's OEIS frontend

A229422 Number of n X 2 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, rows lexicographically nondecreasing, and columns lexicographically nonincreasing.

n	a(n)
1	5
2	12
3	27
4	55
5	102
6	175
7	282
8	432
9	635
10	902
11	1245
12	1677
13	2212
14	2865
15	3652
16	4590
17	5697
18	6992
19	8495
20	10227
21	12210
22	14467
23	17022
24	19900
25	23127
26	26730
27	30737
28	35177
29	40080
30	45477
31	51400
32	57882
33	64957
34	72660
35	81027
36	90095
37	99902
38	110487
39	121890
40	134152

[5, 12, 27, 55, 102, 175, 282, 432, 635, 902, 1245, 1677, 2212, 2865, 3652, 4590, 5697, 6992, 8495, 10227, 12210, 14467, 17022, 19900, 23127, 26730, 30737, 35177, 40080, 45477, 51400, 57882, 64957, 72660, 81027, 90095, 99902, 110487, 121890, 134152]

cp's OEIS Frontend

A229422 Number of n X 2 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, rows lexicographically nondecreasing, and columns lexicographically nonincreasing.

Table of values

List of values