A218348 - cp's OEIS frontend

A218348 Hilltop maps: number of n X 2 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..1 nX2 array.

n	a(n)
1	3
2	11
3	41
4	149
5	547
6	2007
7	7361
8	27001
9	99043
10	363299
11	1332617
12	4888173
13	17930307
14	65770159
15	241251521
16	884934705
17	3246028995
18	11906758971
19	43675182633
20	160204937605
21	587647732323
22	2155550649479
23	7906775346689
24	29002842683433

[3, 11, 41, 149, 547, 2007, 7361, 27001, 99043, 363299, 1332617, 4888173, 17930307, 65770159, 241251521, 884934705, 3246028995, 11906758971, 43675182633, 160204937605, 587647732323, 2155550649479, 7906775346689, 29002842683433]

cp's OEIS Frontend

A218348 Hilltop maps: number of n X 2 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..1 nX2 array.

Table of values

List of values