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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.

A261210 a(n) = gpf(1 + Product_{k=0..4} prime(n+k)), where gpf is greatest prime factor and prime(i) is the i-th prime.

Table of values

n a(n)
1 2311
2 1877
3 163
4 80831
5 12647
6 6967
7 139
8 3633983
9 1657
10 15473
11 2970049
12 933853
13 64776587
14 99767
15 21067
16 84961
17 1524137
18 820319
19 157229
20 489427
21 2066140207
22 71899
23 15287
24 1680583
25 769117
26 55732973
27 52889
28 225941
29 4678959379
30 1491686591
31 87701

List of values

[2311, 1877, 163, 80831, 12647, 6967, 139, 3633983, 1657, 15473, 2970049, 933853, 64776587, 99767, 21067, 84961, 1524137, 820319, 157229, 489427, 2066140207, 71899, 15287, 1680583, 769117, 55732973, 52889, 225941, 4678959379, 1491686591, 87701]

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

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