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.

A109398 a(n) = (1/n!)*Sum_{k=0..n} (n+k)!.

Table of values

n a(n)
0 1
1 3
2 16
3 145
4 1926
5 33649
6 726328
7 18636561
8 553680370
9 18684924841
10 705833193924
11 29502690532393
12 1351724235304366
13 67359683340291105
14 3627011494019437936
15 209846445862386234529
16 12982402818188717219658

List of values

[1, 3, 16, 145, 1926, 33649, 726328, 18636561, 553680370, 18684924841, 705833193924, 29502690532393, 1351724235304366, 67359683340291105, 3627011494019437936, 209846445862386234529, 12982402818188717219658]

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

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