A286895 - cp's OEIS frontend

A286895 Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 7 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	7
3	1
4	28
5	637
6	1
7	196
8	30184
9	10151428
10	1
11	1225
12	1443001
13	3461821825
14	8308236966001
15	1
16	8575
17	70656628
18	1186972525900
19	19948070175962425
20	335267157313994232775
21	1
22	58996
23	3460410037
24	407106879976216
25	47895307855522569001
26	5634835073082541702198396
27	662932711464914589254954278237

[1, 1, 7, 1, 28, 637, 1, 196, 30184, 10151428, 1, 1225, 1443001, 3461821825, 8308236966001, 1, 8575, 70656628, 1186972525900, 19948070175962425, 335267157313994232775, 1, 58996, 3460410037, 407106879976216, 47895307855522569001, 5634835073082541702198396, 662932711464914589254954278237]

cp's OEIS Frontend

A286895 Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 7 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