A220617 - cp's OEIS frontend

A220617 Number of ways to reciprocally link elements of an nX4 array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

n	a(n)
1	5
2	87
3	1189
4	17084
5	243119
6	3466455
7	49406943
8	704243629
9	10038098456
10	143080761421
11	2039439299333
12	29069688249415
13	414352491974681
14	5906082889319188
15	84183915242486395
16	1199937711608731991

[5, 87, 1189, 17084, 243119, 3466455, 49406943, 704243629, 10038098456, 143080761421, 2039439299333, 29069688249415, 414352491974681, 5906082889319188, 84183915242486395, 1199937711608731991]

cp's OEIS Frontend

A220617 Number of ways to reciprocally link elements of an nX4 array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

Table of values

List of values