A267905 - cp's OEIS frontend

A267905 Number of n X 1 0..2 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.

n	a(n)
1	1
2	2
3	5
4	13
5	34
6	88
7	225
8	569
9	1426
10	3548
11	8777
12	21613
13	53026
14	129712
15	316545
16	770993
17	1874914
18	4553588
19	11047625
20	26779909
21	64869586
22	157043368
23	380004897
24	919150313
25	2222499826
26	5372538572
27	12984354185
28	31374801373
29	75801065794

[1, 2, 5, 13, 34, 88, 225, 569, 1426, 3548, 8777, 21613, 53026, 129712, 316545, 770993, 1874914, 4553588, 11047625, 26779909, 64869586, 157043368, 380004897, 919150313, 2222499826, 5372538572, 12984354185, 31374801373, 75801065794]

cp's OEIS Frontend

A267905 Number of n X 1 0..2 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.

Table of values

List of values