A280787 - cp's OEIS frontend

A280787 Triangle read by rows: number of topologically distinct sets of n circles with one pair intersecting, by number of factors.

n	a(n)
2	1
3	3
4	1
5	10
6	4
7	1
8	30
9	15
10	4
11	1
12	91
13	50
14	16
15	4
16	1
17	268
18	162
19	55
20	16
21	4
22	1
23	790
24	506
25	185
26	56
27	16
28	4
29	1
30	2308
31	1558
32	594
33	190
34	56
35	16
36	4
37	1
38	6737
39	4727
40	1878
41	617
42	191
43	56
44	16
45	4
46	1
47	19609
48	14227
49	5825
50	1970
51	622
52	191
53	56
54	16
55	4
56	1

[1, 3, 1, 10, 4, 1, 30, 15, 4, 1, 91, 50, 16, 4, 1, 268, 162, 55, 16, 4, 1, 790, 506, 185, 56, 16, 4, 1, 2308, 1558, 594, 190, 56, 16, 4, 1, 6737, 4727, 1878, 617, 191, 56, 16, 4, 1, 19609, 14227, 5825, 1970, 622, 191, 56, 16, 4, 1]

cp's OEIS Frontend

A280787 Triangle read by rows: number of topologically distinct sets of n circles with one pair intersecting, by number of factors.

Table of values

List of values