A316261 - cp's OEIS frontend

A316261 The number of ways to induce a single pinch on a compact 2-manifold with n handles. (Note: The manifold is embedded in Euclidean 2-space, and each pinch partitions it into at most two submanifolds.)

n	a(n)
0	1
1	3
2	9
3	15
4	26
5	37
6	55
7	73
8	100
9	127
10	165
11	203
12	254
13	305
14	371
15	437
16	520
17	603
18	705
19	807
20	930
21	1053
22	1199
23	1345
24	1516
25	1687
26	1885
27	2083
28	2310
29	2537
30	2795
31	3053
32	3344
33	3635
34	3961
35	4287
36	4650
37	5013
38	5415
39	5817
40	6260

[1, 3, 9, 15, 26, 37, 55, 73, 100, 127, 165, 203, 254, 305, 371, 437, 520, 603, 705, 807, 930, 1053, 1199, 1345, 1516, 1687, 1885, 2083, 2310, 2537, 2795, 3053, 3344, 3635, 3961, 4287, 4650, 5013, 5415, 5817, 6260]

cp's OEIS Frontend

A316261 The number of ways to induce a single pinch on a compact 2-manifold with n handles. (Note: The manifold is embedded in Euclidean 2-space, and each pinch partitions it into at most two submanifolds.)

Table of values

List of values