A364487 - cp's OEIS frontend

A364487 Number of fixed triangular n-ominoes of the regular tiling with Schläfli symbol {3,6} that have a common axis of symmetry coincident with cell altitudes and the point of the polyomino farthest along that axis in a specified direction is a cell edge center.

n	a(n)
1	1
2	0
3	1
4	0
5	2
6	1
7	5
8	2
9	13
10	5
11	36
12	16
13	96
14	45
15	262
16	128
17	720
18	368
19	1991
20	1047
21	5549
22	2995
23	15583
24	8607
25	44027
26	24788
27	125043
28	71620
29	356706
30	207412
31	1021318
32	601719
33	2933861
34	1748874
35	8452723
36	5091776
37	24417793
38	14848210
39	70706750
40	43364962
41	205193316
42	126828277

[1, 0, 1, 0, 2, 1, 5, 2, 13, 5, 36, 16, 96, 45, 262, 128, 720, 368, 1991, 1047, 5549, 2995, 15583, 8607, 44027, 24788, 125043, 71620, 356706, 207412, 1021318, 601719, 2933861, 1748874, 8452723, 5091776, 24417793, 14848210, 70706750, 43364962, 205193316, 126828277]

cp's OEIS Frontend

A364487 Number of fixed triangular n-ominoes of the regular tiling with Schläfli symbol {3,6} that have a common axis of symmetry coincident with cell altitudes and the point of the polyomino farthest along that axis in a specified direction is a cell edge center.

Table of values

List of values