cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A027840 Number of subgroups of index n in fundamental group of a certain fiber space.

Table of values

n a(n)
1 1
2 15
3 220
4 5275
5 151086
6 6605004
7 362069912
8 26370058035
9 2384037107365
10 264380945199210
11 35133143655934644
12 5515729438742221708
13 1009373492449379367974
14 212997911074525038601560
15 51337590023913924398371080
16 14016616814674335739387516003

List of values

[1, 15, 220, 5275, 151086, 6605004, 362069912, 26370058035, 2384037107365, 264380945199210, 35133143655934644, 5515729438742221708, 1009373492449379367974, 212997911074525038601560, 51337590023913924398371080, 14016616814674335739387516003]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.