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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.

A089815 a(n) = floor((n+2)^(n+2)/((n+2)^2-1)).

Table of values

n a(n)
0 1
1 3
2 17
3 130
4 1333
5 17157
6 266305
7 4842756
8 101010101
9 2377597255
10 62350352785
11 1802828015430
12 56984650387477
13 1954883439200265
14 72340172838076673
15 2872362020438669320
16 121815504877079063701
17 5495610154611982192011
18 262801002506265664160401

List of values

[1, 3, 17, 130, 1333, 17157, 266305, 4842756, 101010101, 2377597255, 62350352785, 1802828015430, 56984650387477, 1954883439200265, 72340172838076673, 2872362020438669320, 121815504877079063701, 5495610154611982192011, 262801002506265664160401]

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

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