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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.

A266910 Number of size 2 subsets of S_n that generate a transitive subgroup of S_n.

Table of values

n a(n)
2 1
3 12
4 210
5 5520
6 206760
7 10473120
8 688821840
9 57039171840
10 5805880778880
11 712594633766400
12 103804864923513600
13 17709509301413529600
14 3498328696524626764800
15 792308057159314683187200
16 203965258080479292004608000
17 59229266937652347633377280000
18 19270409372174365076286590976000

List of values

[1, 12, 210, 5520, 206760, 10473120, 688821840, 57039171840, 5805880778880, 712594633766400, 103804864923513600, 17709509301413529600, 3498328696524626764800, 792308057159314683187200, 203965258080479292004608000, 59229266937652347633377280000, 19270409372174365076286590976000]

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

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