A206231 - cp's OEIS frontend

A206231 Number of (n+1) X 2 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order.

n	a(n)
1	15
2	60
3	310
4	1640
5	8910
6	51066
7	294546
8	1710184
9	10051522
10	59273370
11	350336326
12	2076929912
13	12328636710
14	73241168202
15	435453806538
16	2590088923960
17	15409982499130
18	91703551575882
19	545793722630878
20	3248685323916392

[15, 60, 310, 1640, 8910, 51066, 294546, 1710184, 10051522, 59273370, 350336326, 2076929912, 12328636710, 73241168202, 435453806538, 2590088923960, 15409982499130, 91703551575882, 545793722630878, 3248685323916392]

cp's OEIS Frontend

A206231 Number of (n+1) X 2 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order.

Table of values

List of values