A220705 - cp's OEIS frontend

A220705 Number of ways to reciprocally link elements of an n X 5 array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.

n	a(n)
1	1
2	5
3	12
4	37
5	107
6	317
7	932
8	2749
9	8101
10	23881
11	70392
12	207497
13	611639
14	1802937
15	5314536
16	15665721
17	46178025
18	136119501
19	401241028
20	1182742829
21	3486384739
22	10276856693
23	30293209548
24	89295644789
25	263217806797
26	775890178961

[1, 5, 12, 37, 107, 317, 932, 2749, 8101, 23881, 70392, 207497, 611639, 1802937, 5314536, 15665721, 46178025, 136119501, 401241028, 1182742829, 3486384739, 10276856693, 30293209548, 89295644789, 263217806797, 775890178961]

cp's OEIS Frontend

A220705 Number of ways to reciprocally link elements of an n X 5 array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.

Table of values

List of values