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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.

A039652 Becomes prime after n iterations of f(x) = phi(x)+1 (least inverse of A039651).

Table of values

n a(n)
0 2
1 1
2 15
3 35
4 69
5 255
6 535
7 949
8 1957
9 2513
10 2923
11 4531
12 17701
13 22957
14 54589
15 79421
16 80029
17 84493
18 98581
19 102827
20 115243
21 239111
22 291149
23 310813
24 362621
25 398893
26 598341
27 801923
28 838307
29 1063493
30 1079833
31 1123813
32 1311121
33 1329403
34 1582439

List of values

[2, 1, 15, 35, 69, 255, 535, 949, 1957, 2513, 2923, 4531, 17701, 22957, 54589, 79421, 80029, 84493, 98581, 102827, 115243, 239111, 291149, 310813, 362621, 398893, 598341, 801923, 838307, 1063493, 1079833, 1123813, 1311121, 1329403, 1582439]

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

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