A375770 - cp's OEIS frontend

A375770 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 distinct under reflections and rotations.

n	a(n)
1	1
2	1
3	10
4	149
5	3177
6	76258
7	1991098
8	56431302
9	1738662461
10	58282168670
11	2121623710614
12	83566630166058
13	3545346228604588
14	161250925229195536
15	7827463597195165900
16	403872784815626357788
17	22069190323151660044413
18	1273007854598883147607470
19	77288239799225577008977654

[1, 1, 10, 149, 3177, 76258, 1991098, 56431302, 1738662461, 58282168670, 2121623710614, 83566630166058, 3545346228604588, 161250925229195536, 7827463597195165900, 403872784815626357788, 22069190323151660044413, 1273007854598883147607470, 77288239799225577008977654]

cp's OEIS Frontend

A375770 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 distinct under reflections and rotations.

Table of values

List of values