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.

A048133 Least number which becomes prime or 4 after exactly n iterations of f(x) = sum of prime factors of x.

Table of values

n a(n)
0 2
1 6
2 8
3 14
4 26
5 62
6 134
7 393
8 1257
9 4659
10 9314
11 27933
12 167073
13 334142
14 4677862
15 14033577
16 56134292
17 2133102298
18 11788191218
19 52541651594
20 536226160966
21 2681130804805
22 8512643845707
23 129535245187539

List of values

[2, 6, 8, 14, 26, 62, 134, 393, 1257, 4659, 9314, 27933, 167073, 334142, 4677862, 14033577, 56134292, 2133102298, 11788191218, 52541651594, 536226160966, 2681130804805, 8512643845707, 129535245187539]

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

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