A215900 - cp's OEIS frontend

A215900 Number of diagonal and antidiagonal neighbor colorings of the even squares of an nX3 array with new integer colors introduced in row major order.

n	a(n)
1	2
2	2
3	15
4	42
5	726
6	2906
7	84550
8	433252
9	18378580
10	113503692
11	6485270720
12	46538017584
13	3404551437592
14	27700815674032
15	2504332323669064
16	22702140562948192
17	2470653950084307472
18	24626774613248937584

[2, 2, 15, 42, 726, 2906, 84550, 433252, 18378580, 113503692, 6485270720, 46538017584, 3404551437592, 27700815674032, 2504332323669064, 22702140562948192, 2470653950084307472, 24626774613248937584]

cp's OEIS Frontend

A215900 Number of diagonal and antidiagonal neighbor colorings of the even squares of an nX3 array with new integer colors introduced in row major order.

Table of values

List of values