A220623 - cp's OEIS frontend

A220623 Number of ways to reciprocally link elements of an 4Xn array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

n	a(n)
1	1
2	71
3	765
4	17084
5	282777
6	5280827
7	93905509
8	1703300073
9	30648000256
10	553256525421
11	9974206108397
12	179912817659011
13	3244530759637569
14	58516690759430228
15	1055339507419304093
16	19033159346284815815

[1, 71, 765, 17084, 282777, 5280827, 93905509, 1703300073, 30648000256, 553256525421, 9974206108397, 179912817659011, 3244530759637569, 58516690759430228, 1055339507419304093, 19033159346284815815]

cp's OEIS Frontend

A220623 Number of ways to reciprocally link elements of an 4Xn array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

Table of values

List of values