A268557 - cp's OEIS frontend

A268557 Number of immersions of unoriented circle into oriented sphere with n labeled double points, where additionally each double point distinguishes one of the 4 half-edges incident to it.

n	a(n)
1	2
2	32
3	1344
4	99840
5	11034624
6	1646100480
7	311739678720
8	71904311377920
9	19608902534430720
10	6183679018118676480
11	2216537535694661222400
12	890848169343849804595200
13	397015474116844831585075200
14	194397347759742363293555097600
15	103774855190390649524854141747200

[2, 32, 1344, 99840, 11034624, 1646100480, 311739678720, 71904311377920, 19608902534430720, 6183679018118676480, 2216537535694661222400, 890848169343849804595200, 397015474116844831585075200, 194397347759742363293555097600, 103774855190390649524854141747200]

cp's OEIS Frontend

A268557 Number of immersions of unoriented circle into oriented sphere with n labeled double points, where additionally each double point distinguishes one of the 4 half-edges incident to it.

Table of values

List of values