A203176 - cp's OEIS frontend

A203176 Number of n X 3 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.

n	a(n)
1	2
2	2
3	7
4	17
5	41
6	97
7	235
8	607
9	1415
10	3486
11	8648
12	20838
13	51170
14	124939
15	305270
16	746199
17	1820662
18	4454559
19	10877169
20	26569604
21	64944236
22	158629072
23	387600053
24	946993492
25	2313654220
26	5653010591
27	13810992779
28	33744134975
29	82444452049

[2, 2, 7, 17, 41, 97, 235, 607, 1415, 3486, 8648, 20838, 51170, 124939, 305270, 746199, 1820662, 4454559, 10877169, 26569604, 64944236, 158629072, 387600053, 946993492, 2313654220, 5653010591, 13810992779, 33744134975, 82444452049]

cp's OEIS Frontend

A203176 Number of n X 3 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.

Table of values

List of values