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.

A320453 a(n) = (n^n + n*(-1)^n)/(n + 1).

Table of values

n a(n)
1 0
2 2
3 6
4 52
5 520
6 6666
7 102942
8 1864136
9 38742048
10 909090910
11 23775972550
12 685853880636
13 21633936185160
14 740800455037202
15 27368368148803710
16 1085102592571150096
17 45957792327018709120
18 2070863582910344082918
19 98920982783015679456198
20 4993219047619047619047620

List of values

[0, 2, 6, 52, 520, 6666, 102942, 1864136, 38742048, 909090910, 23775972550, 685853880636, 21633936185160, 740800455037202, 27368368148803710, 1085102592571150096, 45957792327018709120, 2070863582910344082918, 98920982783015679456198, 4993219047619047619047620]

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

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