A217451 - cp's OEIS frontend

A217451 Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 n X 2 array.

n	a(n)
1	3
2	15
3	69
4	253
5	1049
6	4205
7	16887
8	68015
9	273471
10	1100135
11	4425449
12	17801365
13	71607677
14	288046417
15	1158686263
16	4660895899
17	18748771139
18	75418217399
19	303374944277
20	1220346484777
21	4908927310389
22	19746496259789
23	79431633434755

[3, 15, 69, 253, 1049, 4205, 16887, 68015, 273471, 1100135, 4425449, 17801365, 71607677, 288046417, 1158686263, 4660895899, 18748771139, 75418217399, 303374944277, 1220346484777, 4908927310389, 19746496259789, 79431633434755]

cp's OEIS Frontend

A217451 Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 n X 2 array.

Table of values

List of values