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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.

A068983 a(n) = Sum_{k=0..n} (k^k-k!).

Table of values

n a(n)
1 0
2 2
3 23
4 255
5 3260
6 49196
7 867699
8 17604595
9 404662204
10 10401033404
11 295672787215
12 9211294233871
13 312080173805324
14 11423999821072140
15 449316582527563515
16 18896039733447227131
17 846135945932355895308
18 40192537618855187742732
19 2018612071634068368034711

List of values

[0, 2, 23, 255, 3260, 49196, 867699, 17604595, 404662204, 10401033404, 295672787215, 9211294233871, 312080173805324, 11423999821072140, 449316582527563515, 18896039733447227131, 846135945932355895308, 40192537618855187742732, 2018612071634068368034711]

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

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