A221441 - cp's OEIS frontend

A221441 Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 n X 3 array.

n	a(n)
1	5
2	33
3	221
4	1473
5	9829
6	65569
7	437437
8	2918273
9	19468741
10	129882145
11	866485149
12	5780598081
13	38564209189
14	257274109985
15	1716357449085
16	11450366664449
17	76389039372165
18	509615587618849
19	3399807737852509
20	22681199192442049

[5, 33, 221, 1473, 9829, 65569, 437437, 2918273, 19468741, 129882145, 866485149, 5780598081, 38564209189, 257274109985, 1716357449085, 11450366664449, 76389039372165, 509615587618849, 3399807737852509, 22681199192442049]

cp's OEIS Frontend

A221441 Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 n X 3 array.

Table of values

List of values