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.

A049531 Number of digraphs with a source and a sink on n unlabeled nodes.

Table of values

n a(n)
1 1
2 2
3 11
4 173
5 8675
6 1483821
7 870901739
8 1786098545810
9 13011539185371716
10 341128981258340797839
11 32519138088689298538132027
12 11366354205366488038532562993809
13 14668937734550708660348161757913398001
14 70315451107713339843384354196009678853303102

List of values

[1, 2, 11, 173, 8675, 1483821, 870901739, 1786098545810, 13011539185371716, 341128981258340797839, 32519138088689298538132027, 11366354205366488038532562993809, 14668937734550708660348161757913398001, 70315451107713339843384354196009678853303102]

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

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