A220629 - cp's OEIS frontend

A220629 Number of ways to reciprocally link elements of an n X 5 array either to themselves or to exactly two horizontal or antidiagonal neighbors.

n	a(n)
1	1
2	8
3	44
4	257
5	1481
6	8560
7	49448
8	285669
9	1650333
10	9534128
11	55079528
12	318199485
13	1838267585
14	10619840324
15	61351790884
16	354434918989
17	2047603011865
18	11829190267612
19	68338316351600
20	394796716945057
21	2280776817922653

[1, 8, 44, 257, 1481, 8560, 49448, 285669, 1650333, 9534128, 55079528, 318199485, 1838267585, 10619840324, 61351790884, 354434918989, 2047603011865, 11829190267612, 68338316351600, 394796716945057, 2280776817922653]

cp's OEIS Frontend

A220629 Number of ways to reciprocally link elements of an n X 5 array either to themselves or to exactly two horizontal or antidiagonal neighbors.

Table of values

List of values