A342989 - cp's OEIS frontend

A342989 Triangle read by rows: T(n,k) is the number of nonseparable rooted toroidal maps with n edges and k faces, n >= 2, k = 1..n-1.

n	a(n)
2	1
3	4
4	4
5	10
6	39
7	10
8	20
9	190
10	190
11	20
12	35
13	651
14	1568
15	651
16	35
17	56
18	1792
19	8344
20	8344
21	1792
22	56
23	84
24	4242
25	33580
26	64667
27	33580
28	4242
29	84
30	120
31	8988
32	111100
33	361884
34	361884
35	111100
36	8988
37	120
38	165
39	17490
40	317680
41	1607125
42	2713561
43	1607125
44	317680
45	17490
46	165

[1, 4, 4, 10, 39, 10, 20, 190, 190, 20, 35, 651, 1568, 651, 35, 56, 1792, 8344, 8344, 1792, 56, 84, 4242, 33580, 64667, 33580, 4242, 84, 120, 8988, 111100, 361884, 361884, 111100, 8988, 120, 165, 17490, 317680, 1607125, 2713561, 1607125, 317680, 17490, 165]

cp's OEIS Frontend

A342989 Triangle read by rows: T(n,k) is the number of nonseparable rooted toroidal maps with n edges and k faces, n >= 2, k = 1..n-1.

Table of values

List of values