A220707 - cp's OEIS frontend

A220707 Number of ways to reciprocally link elements of an n X 7 array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.

n	a(n)
1	1
2	13
3	48
4	298
5	1520
6	8338
7	44976
8	244029
9	1322551
10	7171769
11	38885648
12	210854845
13	1143330649
14	6199601829
15	33616711696
16	182283373322
17	988413912488
18	5359579124490
19	29061800830768
20	157584813722329
21	854488462716575

[1, 13, 48, 298, 1520, 8338, 44976, 244029, 1322551, 7171769, 38885648, 210854845, 1143330649, 6199601829, 33616711696, 182283373322, 988413912488, 5359579124490, 29061800830768, 157584813722329, 854488462716575]

cp's OEIS Frontend

A220707 Number of ways to reciprocally link elements of an n X 7 array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.

Table of values

List of values