A098912 - cp's OEIS frontend

A098912 Number of ways angles from Pi/n to (n-1)Pi/n can tile around a vertex, where rotations and reflections of an angle sequence are not counted.

n	a(n)
2	1
3	5
4	16
5	54
6	180
7	607
8	2098
9	7397
10	26452
11	95821
12	350554
13	1292634
14	4797694
15	17904220
16	67125898
17	252679320
18	954505718
19	3616951513
20	13744169104
21	52358244166
22	199912298266
23	764879838343
24	2932035371786
25	11259007784430
26	43303859981236
27	166800020984581

[1, 5, 16, 54, 180, 607, 2098, 7397, 26452, 95821, 350554, 1292634, 4797694, 17904220, 67125898, 252679320, 954505718, 3616951513, 13744169104, 52358244166, 199912298266, 764879838343, 2932035371786, 11259007784430, 43303859981236, 166800020984581]

cp's OEIS Frontend

A098912 Number of ways angles from Pi/n to (n-1)Pi/n can tile around a vertex, where rotations and reflections of an angle sequence are not counted.

Table of values

List of values