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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.

A171080 a(n) = Product_{3 <= p <= 2*n+1, p prime} p^floor(2*n / (p - 1)).

Table of values

n a(n)
0 1
1 3
2 45
3 945
4 14175
5 467775
6 638512875
7 1915538625
8 488462349375
9 194896477400625
10 32157918771103125
11 2218896395206115625
12 3028793579456347828125
13 9086380738369043484375
14 3952575621190533915703125
15 28304394023345413370350078125
16 7217620475953080409439269921875

List of values

[1, 3, 45, 945, 14175, 467775, 638512875, 1915538625, 488462349375, 194896477400625, 32157918771103125, 2218896395206115625, 3028793579456347828125, 9086380738369043484375, 3952575621190533915703125, 28304394023345413370350078125, 7217620475953080409439269921875]

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

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