A378075 - cp's OEIS frontend

A378075 Triangle read by rows: T(n,k) is the number of embeddings on the sphere of 2-connected homeomorphically irreducible planar graphs with n nodes and k faces, k=4..2n-4.

n	a(n)
4	1
5	0
6	1
7	1
8	0
9	1
10	3
11	3
12	2
13	0
14	0
15	3
16	11
17	18
18	10
19	5
20	0
21	0
22	3
23	19
24	77
25	134
26	123
27	50
28	14
29	0
30	0
31	0
32	13
33	146
34	603
35	1280
36	1420
37	883
38	278
39	50
40	0
41	0
42	0
43	8
44	162
45	1409
46	6030
47	13781
48	18404
49	14570
50	6884
51	1772
52	233
53	0
54	0
55	0
56	0
57	83
58	1809
59	15225
60	64502
61	158717
62	240841
63	233286
64	144005
65	55444
66	12077
67	1249

[1, 0, 1, 1, 0, 1, 3, 3, 2, 0, 0, 3, 11, 18, 10, 5, 0, 0, 3, 19, 77, 134, 123, 50, 14, 0, 0, 0, 13, 146, 603, 1280, 1420, 883, 278, 50, 0, 0, 0, 8, 162, 1409, 6030, 13781, 18404, 14570, 6884, 1772, 233, 0, 0, 0, 0, 83, 1809, 15225, 64502, 158717, 240841, 233286, 144005, 55444, 12077, 1249]

cp's OEIS Frontend

A378075 Triangle read by rows: T(n,k) is the number of embeddings on the sphere of 2-connected homeomorphically irreducible planar graphs with n nodes and k faces, k=4..2n-4.

Table of values

List of values