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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.

A068581 Let phi_m(x) = phi(phi(...(phi(x))...)) m times; sequence gives values of k such that phi_4(k) = tau(k).

Table of values

n a(n)
1 1
2 17
3 23
4 29
5 31
6 37
7 43
8 51
9 55
10 65
11 69
12 77
13 82
14 87
15 91
16 93
17 94
18 95
19 106
20 111
21 118
22 122
23 128
24 129
25 133
26 134
27 136
28 142
29 146
30 158
31 165
32 170
33 184
34 195
35 218
36 230
37 231
38 232
39 238
40 243
41 246
42 248
43 250
44 254
45 273
46 282
47 285
48 286
49 290
50 296
51 297
52 310
53 318
54 322
55 344
56 351

List of values

[1, 17, 23, 29, 31, 37, 43, 51, 55, 65, 69, 77, 82, 87, 91, 93, 94, 95, 106, 111, 118, 122, 128, 129, 133, 134, 136, 142, 146, 158, 165, 170, 184, 195, 218, 230, 231, 232, 238, 243, 246, 248, 250, 254, 273, 282, 285, 286, 290, 296, 297, 310, 318, 322, 344, 351]

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

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