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.

A138524 a(n) = Sum_{k=1..n} (2*k)!.

Table of values

n a(n)
1 2
2 26
3 746
4 41066
5 3669866
6 482671466
7 87660962666
8 21010450850666
9 6423384156578666
10 2439325392333218666
11 1126440053169940898666
12 621574841786409380258666
13 403913035968392044964258666
14 305292257647682252546468258666

List of values

[2, 26, 746, 41066, 3669866, 482671466, 87660962666, 21010450850666, 6423384156578666, 2439325392333218666, 1126440053169940898666, 621574841786409380258666, 403913035968392044964258666, 305292257647682252546468258666]

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

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