A286921 - cp's OEIS frontend

A286921 Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 10 colors and n>=m, two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other.

n	a(n)
0	1
1	1
2	10
3	1
4	55
5	2575
6	1
7	550
8	253000
9	250525000
10	1
11	5050
12	25007500
13	250025500000
14	2500000075000000
15	1
16	50500
17	2500300000
18	250002775000000
19	25000000255000000000
20	2500000000502500000000000
21	1
22	500500
23	250000750000
24	250000250500000000
25	250000000000750000000000
26	250000000000250500000000000000
27	250000000000000000750000000000000000

[1, 1, 10, 1, 55, 2575, 1, 550, 253000, 250525000, 1, 5050, 25007500, 250025500000, 2500000075000000, 1, 50500, 2500300000, 250002775000000, 25000000255000000000, 2500000000502500000000000, 1, 500500, 250000750000, 250000250500000000, 250000000000750000000000, 250000000000250500000000000000, 250000000000000000750000000000000000]

cp's OEIS Frontend

A286921 Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 10 colors and n>=m, two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other.

Table of values

List of values