A097872 - cp's OEIS frontend

A097872 Numerator of J(n) = A000356(n)/A000309(n) (average number of 4-colorings of rank 0 in a rooted nonseparable map which is trivalent and has 2n nodes).

n	a(n)
1	1
2	5
3	35
4	147
5	99
6	4719
7	102245
8	158015
9	71383
10	9493939
11	117578783
12	81161825
13	192225375
14	10034164575
15	176876744175
16	874129996575
17	506075261175
18	43691164214775
19	54585584382615
20	91204126883805
21	75171984897685
22	11189060829001575
23	315531515377844415
24	3726508102129106091

[1, 5, 35, 147, 99, 4719, 102245, 158015, 71383, 9493939, 117578783, 81161825, 192225375, 10034164575, 176876744175, 874129996575, 506075261175, 43691164214775, 54585584382615, 91204126883805, 75171984897685, 11189060829001575, 315531515377844415, 3726508102129106091]

cp's OEIS Frontend

A097872 Numerator of J(n) = A000356(n)/A000309(n) (average number of 4-colorings of rank 0 in a rooted nonseparable map which is trivalent and has 2n nodes).

Table of values

List of values