A229425 - cp's OEIS frontend

A229425 Number of n X 5 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	17
2	102
3	524
4	2204
5	7816
6	24126
7	66503
8	166972
9	387738
10	842802
11	1731129
12	3385828
13	6344979
14	11451106
15	19987862
16	33864276
17	55858927
18	89938670
19	141669058
20	218736396
21	331604442
22	494332150
23	725582545
24	1049856844
25	1498992304

[17, 102, 524, 2204, 7816, 24126, 66503, 166972, 387738, 842802, 1731129, 3385828, 6344979, 11451106, 19987862, 33864276, 55858927, 89938670, 141669058, 218736396, 331604442, 494332150, 725582545, 1049856844, 1498992304]

cp's OEIS Frontend

A229425 Number of n X 5 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