A097875 - cp's OEIS frontend

A097875 Denominator 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	4
3	24
4	88
5	52
6	2176
7	41344
8	55936
9	22080
10	2561280
11	27617280
12	16570368
13	34061312
14	1540980736
15	23512383488
16	100462002176
17	50231001088
18	3741530783744
19	4029340844032
20	5798319751168
21	4112761683968
22	526433495547904
23	12757611732533248
24	129398633287122944

[1, 4, 24, 88, 52, 2176, 41344, 55936, 22080, 2561280, 27617280, 16570368, 34061312, 1540980736, 23512383488, 100462002176, 50231001088, 3741530783744, 4029340844032, 5798319751168, 4112761683968, 526433495547904, 12757611732533248, 129398633287122944]

cp's OEIS Frontend

A097875 Denominator 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