A220704 - cp's OEIS frontend

A220704 Number of ways to reciprocally link elements of an n X n array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.

n	a(n)
1	1
2	1
3	3
4	13
5	107
6	1617
7	44976
8	2282408
9	216083336
10	37166744488
11	11934907610044
12	6974153590170208
13	7595477025017870022
14	15083748097547577433271
15	55729708477784939752304144
16	376141278066033748724918163244

[1, 1, 3, 13, 107, 1617, 44976, 2282408, 216083336, 37166744488, 11934907610044, 6974153590170208, 7595477025017870022, 15083748097547577433271, 55729708477784939752304144, 376141278066033748724918163244]

cp's OEIS Frontend

A220704 Number of ways to reciprocally link elements of an n X n array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.

Table of values

List of values