A228583 - cp's OEIS frontend

A228583 The number of binary pattern classes in the (2,n)-rectangular grid with 8 '1's and (2n-8) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	15
6	135
7	777
8	3270
9	11034
10	31650
11	80190
12	184239
13	391105
14	777777
15	1464255
16	2630940
17	4540836
18	7567380
19	12228780
20	19229805
21	29512035
22	44313643
23	65239845
24	94345218
25	134229150
26	188145750
27	260129610
28	355138875
29	479217141
30	639675765
31	845298235
32	1106568312

[0, 0, 0, 0, 1, 15, 135, 777, 3270, 11034, 31650, 80190, 184239, 391105, 777777, 1464255, 2630940, 4540836, 7567380, 12228780, 19229805, 29512035, 44313643, 65239845, 94345218, 134229150, 188145750, 260129610, 355138875, 479217141, 639675765, 845298235, 1106568312]

cp's OEIS Frontend

A228583 The number of binary pattern classes in the (2,n)-rectangular grid with 8 '1's and (2n-8) '0's: two patterns are in 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