A225972 - cp's OEIS frontend

A225972 The number of binary pattern classes in the (2,n)-rectangular grid with 3 '1's and (2n-3) '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	1
3	6
4	14
5	32
6	55
7	94
8	140
9	208
10	285
11	390
12	506
13	656
14	819
15	1022
16	1240
17	1504
18	1785
19	2118
20	2470
21	2880
22	3311
23	3806
24	4324
25	4912
26	5525
27	6214
28	6930
29	7728
30	8555
31	9470
32	10416
33	11456
34	12529
35	13702
36	14910
37	16224
38	17575
39	19038
40	20540
41	22160
42	23821
43	25606
44	27434
45	29392

[0, 0, 1, 6, 14, 32, 55, 94, 140, 208, 285, 390, 506, 656, 819, 1022, 1240, 1504, 1785, 2118, 2470, 2880, 3311, 3806, 4324, 4912, 5525, 6214, 6930, 7728, 8555, 9470, 10416, 11456, 12529, 13702, 14910, 16224, 17575, 19038, 20540, 22160, 23821, 25606, 27434, 29392]

cp's OEIS Frontend

A225972 The number of binary pattern classes in the (2,n)-rectangular grid with 3 '1's and (2n-3) '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