A220639 - cp's OEIS frontend

A220639 Number of ways to reciprocally link elements of an n X 3 array either to themselves or to exactly one king-move neighbor.

n	a(n)
0	1
1	3
2	40
3	369
4	3755
5	37320
6	373177
7	3725843
8	37213728
9	371654153
10	3711809483
11	37070598992
12	370232236753
13	3697589375491
14	36928628181272
15	368814220524417
16	3683427651446923
17	36787191180049816
18	367401660507886793
19	3669320102980547411
20	36646296045314442000

[1, 3, 40, 369, 3755, 37320, 373177, 3725843, 37213728, 371654153, 3711809483, 37070598992, 370232236753, 3697589375491, 36928628181272, 368814220524417, 3683427651446923, 36787191180049816, 367401660507886793, 3669320102980547411, 36646296045314442000]

cp's OEIS Frontend

A220639 Number of ways to reciprocally link elements of an n X 3 array either to themselves or to exactly one king-move neighbor.

Table of values

List of values