A375860 - cp's OEIS frontend

A375860 In an n X n grid draw straight walls between cells, starting at a border, such that the resulting figure is connected and has only one-cell wide paths; a(n) is the number of solutions up to symmetries of the rectangle.

n	a(n)
1	1
2	2
3	19
4	298
5	6351
6	152516
7	3982186
8	112862604
9	3477324887
10	116564337340
11	4243247421102
12	167133260332116
13	7090692457208714
14	322501850458391072
15	15654927194390330084
16	807745569631252715576
17	44138380646303320082391
18	2546015709197766295214940
19	154576479598451154017930998

[1, 2, 19, 298, 6351, 152516, 3982186, 112862604, 3477324887, 116564337340, 4243247421102, 167133260332116, 7090692457208714, 322501850458391072, 15654927194390330084, 807745569631252715576, 44138380646303320082391, 2546015709197766295214940, 154576479598451154017930998]

cp's OEIS Frontend

A375860 In an n X n grid draw straight walls between cells, starting at a border, such that the resulting figure is connected and has only one-cell wide paths; a(n) is the number of solutions up to symmetries of the rectangle.

Table of values

List of values