A272435 - cp's OEIS frontend

A272435 Number of n-ominoes in n X n grid (i.e., rookwise connected sets of n cells in a square array with n rows and n columns).

n	a(n)
1	1
2	4
3	22
4	113
5	571
6	2816
7	13616
8	64678
9	302574
10	1397318
11	6382660
12	28882214
13	129640058
14	577812724
15	2559491834
16	11276000877
17	49437494408
18	215815377168

[1, 4, 22, 113, 571, 2816, 13616, 64678, 302574, 1397318, 6382660, 28882214, 129640058, 577812724, 2559491834, 11276000877, 49437494408, 215815377168]

cp's OEIS Frontend

A272435 Number of n-ominoes in n X n grid (i.e., rookwise connected sets of n cells in a square array with n rows and n columns).

Table of values

List of values