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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.

A069015 a(n) = n! * 3^n * Sum_{i=1..n} 1/(i * 3^i).

Table of values

n a(n)
1 1
2 7
3 65
4 786
5 11814
6 212772
7 4468932
8 107259408
9 2896044336
10 86881692960
11 2867099496480
12 103215621790080
13 4025409728814720
14 169067214837239040
15 7608024754854048000
16 365185189540668672000
17 18624444687496892160000

List of values

[1, 7, 65, 786, 11814, 212772, 4468932, 107259408, 2896044336, 86881692960, 2867099496480, 103215621790080, 4025409728814720, 169067214837239040, 7608024754854048000, 365185189540668672000, 18624444687496892160000]

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

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