A260914 - cp's OEIS frontend

A260914 Triangle read by rows: T(n,g) = number of general immersions of a circle with n crossings in a surface of arbitrary genus g (the circle is not oriented, the surface is not oriented).

n	a(n)
1	1
2	2
3	1
4	6
5	5
6	1
7	19
8	45
9	22
10	0
11	76
12	335
13	427
14	56
15	0
16	376
17	3101
18	7557
19	3681
20	0
21	0
22	2194
23	29415
24	124919
25	139438
26	17398
27	0
28	0
29	14614
30	295859
31	1921246
32	4098975
33	1768704
34	0
35	0
36	0
37	106421
38	3031458
39	29479410
40	102054037
41	99304511
42	11262088
43	0
44	0
45	0

[1, 2, 1, 6, 5, 1, 19, 45, 22, 0, 76, 335, 427, 56, 0, 376, 3101, 7557, 3681, 0, 0, 2194, 29415, 124919, 139438, 17398, 0, 0, 14614, 295859, 1921246, 4098975, 1768704, 0, 0, 0, 106421, 3031458, 29479410, 102054037, 99304511, 11262088, 0, 0, 0]

cp's OEIS Frontend

A260914 Triangle read by rows: T(n,g) = number of general immersions of a circle with n crossings in a surface of arbitrary genus g (the circle is not oriented, the surface is not oriented).

Table of values

List of values