A220711 - cp's OEIS frontend

A220711 Number of ways to reciprocally link elements of an 6Xn array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.

n	a(n)
1	1
2	1
3	13
4	60
5	317
6	1617
7	8338
8	42873
9	221082
10	1139020
11	5870960
12	30259204
13	155962396
14	803874071
15	4143371101
16	21356146495
17	110075467413
18	567360680620
19	2924337273221
20	15072870834560
21	77689863937436
22	400435729023800

[1, 1, 13, 60, 317, 1617, 8338, 42873, 221082, 1139020, 5870960, 30259204, 155962396, 803874071, 4143371101, 21356146495, 110075467413, 567360680620, 2924337273221, 15072870834560, 77689863937436, 400435729023800]

cp's OEIS Frontend

A220711 Number of ways to reciprocally link elements of an 6Xn array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.

Table of values

List of values