A221270 - cp's OEIS frontend

A221270 Number of n X 2 arrays of occupancy after each element moves to some king-move neighbor, with every occupancy equal to zero or two.

n	a(n)
1	0
2	6
3	16
4	52
5	174
6	588
7	1984
8	6688
9	22536
10	75924
11	255760
12	861496
13	2901696
14	9773184
15	32916280
16	110861104
17	373373568
18	1257492096
19	4235114944
20	14263430416
21	48037679232
22	161785483872
23	544874848384
24	1835074738624
25	6180315022560

[0, 6, 16, 52, 174, 588, 1984, 6688, 22536, 75924, 255760, 861496, 2901696, 9773184, 32916280, 110861104, 373373568, 1257492096, 4235114944, 14263430416, 48037679232, 161785483872, 544874848384, 1835074738624, 6180315022560]

cp's OEIS Frontend

A221270 Number of n X 2 arrays of occupancy after each element moves to some king-move neighbor, with every occupancy equal to zero or two.

Table of values

List of values