A375817 - cp's OEIS frontend

A375817 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 not reduced for symmetries.

n	a(n)
1	1
2	4
3	56
4	1112
5	25000
6	607712
7	15918280
8	451371888
9	13908978792
10	466254401360
11	16972978214456
12	668532916285104
13	28362769354991656
14	1290007395847848160
15	62619708755213093360
16	3230982278203826268640
17	176553522584025285715304
18	10184062836771923067636528

[1, 4, 56, 1112, 25000, 607712, 15918280, 451371888, 13908978792, 466254401360, 16972978214456, 668532916285104, 28362769354991656, 1290007395847848160, 62619708755213093360, 3230982278203826268640, 176553522584025285715304, 10184062836771923067636528]

cp's OEIS Frontend

A375817 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 not reduced for symmetries.

Table of values

List of values