A067640 - cp's OEIS frontend

A067640 Table T(n,k) giving number of two-legged knot diagrams with n >= 0 self-intersections and k >= 0 tangencies, read by antidiagonals.

n	a(n)
0	1
1	2
2	2
3	8
4	20
5	10
6	42
7	174
8	210
9	70
10	260
11	1504
12	2992
13	2352
14	588
15	1796
16	13300
17	37100
18	47820
19	27720
20	5544
21	13396
22	120744
23	433620
24	784672
25	742296
26	339768
27	56628
28	105706
29	1122198
30	4928798
31	11515714
32	15294006
33	11376554
34	4294290

[1, 2, 2, 8, 20, 10, 42, 174, 210, 70, 260, 1504, 2992, 2352, 588, 1796, 13300, 37100, 47820, 27720, 5544, 13396, 120744, 433620, 784672, 742296, 339768, 56628, 105706, 1122198, 4928798, 11515714, 15294006, 11376554, 4294290]

cp's OEIS Frontend

A067640 Table T(n,k) giving number of two-legged knot diagrams with n >= 0 self-intersections and k >= 0 tangencies, read by antidiagonals.

Table of values

List of values