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.

A354339 a(n) = n! * Sum_{k=1..n} ( Sum_{d|k} 1/(d * (k/d)^d) )/(n-k)!.

Table of values

n a(n)
1 1
2 4
3 13
4 47
5 188
6 939
7 5332
8 36196
9 279085
10 2464592
11 23591753
12 259110191
13 3030440580
14 38874240339
15 535736880460
16 8027897509136
17 126034992483809
18 2144006461602308
19 38072688073456557
20 723023026186433271
21 14342481336066795732
22 301141522554921194275

List of values

[1, 4, 13, 47, 188, 939, 5332, 36196, 279085, 2464592, 23591753, 259110191, 3030440580, 38874240339, 535736880460, 8027897509136, 126034992483809, 2144006461602308, 38072688073456557, 723023026186433271, 14342481336066795732, 301141522554921194275]

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

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