A220548 - cp's OEIS frontend

A220548 Number of ways to reciprocally link elements of an n X 3 array either to themselves or to exactly one horizontal, vertical or antidiagonal neighbor.

n	a(n)
1	3
2	29
3	224
4	1814
5	14556
6	117022
7	940432
8	7558245
9	60744605
10	488197825
11	3923590632
12	31533457665
13	253430854415
14	2036795298237
15	16369494914388
16	131559791031398
17	1057331255850916
18	8497652480629342
19	68294678022457540
20	548876652325439237

[3, 29, 224, 1814, 14556, 117022, 940432, 7558245, 60744605, 488197825, 3923590632, 31533457665, 253430854415, 2036795298237, 16369494914388, 131559791031398, 1057331255850916, 8497652480629342, 68294678022457540, 548876652325439237]

cp's OEIS Frontend

A220548 Number of ways to reciprocally link elements of an n X 3 array either to themselves or to exactly one horizontal, vertical or antidiagonal neighbor.

Table of values

List of values