A220565 - cp's OEIS frontend

A220565 Number of ways to reciprocally link elements of an 4Xn array either to themselves or to exactly one horizontal or antidiagonal neighbor.

n	a(n)
1	1
2	34
3	292
4	3966
5	45966
6	561636
7	6743873
8	81437539
9	981628768
10	11839220919
11	142763980945
12	1721628751022
13	20761198193082
14	250361650578082
15	3019134246246588
16	36408038586112352
17	439048064386701057

[1, 34, 292, 3966, 45966, 561636, 6743873, 81437539, 981628768, 11839220919, 142763980945, 1721628751022, 20761198193082, 250361650578082, 3019134246246588, 36408038586112352, 439048064386701057]

cp's OEIS Frontend

A220565 Number of ways to reciprocally link elements of an 4Xn array either to themselves or to exactly one horizontal or antidiagonal neighbor.

Table of values

List of values