A091665 - cp's OEIS frontend

A091665 Triangle read by rows: T(n,k) is the number of nonseparable planar maps with 2n+1 edges and a fixed outer face of 2k edges which are invariant under a rotation of a 1/2 turn.

n	a(n)
1	1
2	2
3	2
4	7
5	8
6	3
7	30
8	34
9	21
10	4
11	143
12	160
13	114
14	44
15	5
16	728
17	806
18	609
19	308
20	80
21	6
22	3876
23	4256
24	3315
25	1908
26	715
27	132
28	7
29	21318
30	23256
31	18444
32	11420
33	5185
34	1482
35	203
36	8
37	120175
38	130416
39	104652
40	67856
41	34520
42	12600
43	2814
44	296
45	9
46	690690
47	746350
48	603801
49	404016
50	221300
51	93924
52	27965
53	4984
54	414
55	10

[1, 2, 2, 7, 8, 3, 30, 34, 21, 4, 143, 160, 114, 44, 5, 728, 806, 609, 308, 80, 6, 3876, 4256, 3315, 1908, 715, 132, 7, 21318, 23256, 18444, 11420, 5185, 1482, 203, 8, 120175, 130416, 104652, 67856, 34520, 12600, 2814, 296, 9, 690690, 746350, 603801, 404016, 221300, 93924, 27965, 4984, 414, 10]

cp's OEIS Frontend

A091665 Triangle read by rows: T(n,k) is the number of nonseparable planar maps with 2n+1 edges and a fixed outer face of 2k edges which are invariant under a rotation of a 1/2 turn.

Table of values

List of values

cp's OEIS Frontend

A091665 Triangle read by rows: T(n,k) is the number of nonseparable planar maps with 2*n+1 edges and a fixed outer face of 2*k edges which are invariant under a rotation of a 1/2 turn.

Table of values

List of values

A091665 Triangle read by rows: T(n,k) is the number of nonseparable planar maps with 2n+1 edges and a fixed outer face of 2k edges which are invariant under a rotation of a 1/2 turn.