A268953 - cp's OEIS frontend

A268953 Number of length-n 0..5 arrays with no repeated value equal to the previous repeated value, with new values introduced in sequential order.

n	a(n)
1	1
2	2
3	4
4	12
5	40
6	154
7	655
8	3045
9	15124
10	78930
11	426289
12	2355975
13	13216982
14	74856340
15	426491859
16	2438853865
17	13977348104
18	80210943670
19	460646222293
20	2646524858907
21	15207848530170
22	87395420173144
23	502235483752631
24	2886069610014893

[1, 2, 4, 12, 40, 154, 655, 3045, 15124, 78930, 426289, 2355975, 13216982, 74856340, 426491859, 2438853865, 13977348104, 80210943670, 460646222293, 2646524858907, 15207848530170, 87395420173144, 502235483752631, 2886069610014893]

cp's OEIS Frontend

A268953 Number of length-n 0..5 arrays with no repeated value equal to the previous repeated value, with new values introduced in sequential order.

Table of values

List of values