A218645 - cp's OEIS frontend

A218645 Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..3 n X 2 array.

n	a(n)
1	4
2	16
3	66
4	292
5	1280
6	5644
7	24782
8	108940
9	478862
10	2104866
11	9252000
12	40667620
13	178756504
14	785732636
15	3453724976
16	15181011874
17	66728857148
18	293309853452
19	1289257359676
20	5666991817956
21	24909531073894
22	109491024206644

[4, 16, 66, 292, 1280, 5644, 24782, 108940, 478862, 2104866, 9252000, 40667620, 178756504, 785732636, 3453724976, 15181011874, 66728857148, 293309853452, 1289257359676, 5666991817956, 24909531073894, 109491024206644]

cp's OEIS Frontend

A218645 Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..3 n X 2 array.

Table of values

List of values