A221694 - cp's OEIS frontend

A221694 Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.

n	a(n)
1	1
2	21
3	152
4	1336
5	11036
6	92660
7	774380
8	6479664
9	54200980
10	453418640
11	3792991120
12	31729761276
13	265430689860
14	2220422566716
15	18574626389432
16	155383375746468
17	1299837358873328
18	10873603138412824
19	90961568659281764
20	760925966163564220

[1, 21, 152, 1336, 11036, 92660, 774380, 6479664, 54200980, 453418640, 3792991120, 31729761276, 265430689860, 2220422566716, 18574626389432, 155383375746468, 1299837358873328, 10873603138412824, 90961568659281764, 760925966163564220]

cp's OEIS Frontend

A221694 Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.

Table of values

List of values