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.

A070814 Solutions to phi(gpf(x)) - gpf(phi(x)) = 14 = c are special multiples of 17, x = 17k, where greatest prime factors of factor k were observed from {2, 3, 5}, i.e., it is smaller than 17. See solutions to other even cases of c (=A070813): A007283 for 0, A070004 for 2, A070815 for 254, A070816 for 65534. Gpf = greatest prime factor.

Table of values

n a(n)
1 17
2 34
3 51
4 68
5 85
6 102
7 136
8 170
9 204
10 255
11 272
12 340
13 408
14 510
15 544
16 680
17 816
18 1020
19 1088
20 1360
21 1632
22 2040
23 2176
24 2720
25 3264
26 4080
27 4352
28 5440
29 6528
30 8160
31 8704
32 10880
33 13056
34 16320
35 17408
36 21760
37 26112
38 32640
39 34816
40 43520
41 52224
42 65280

List of values

[17, 34, 51, 68, 85, 102, 136, 170, 204, 255, 272, 340, 408, 510, 544, 680, 816, 1020, 1088, 1360, 1632, 2040, 2176, 2720, 3264, 4080, 4352, 5440, 6528, 8160, 8704, 10880, 13056, 16320, 17408, 21760, 26112, 32640, 34816, 43520, 52224, 65280]

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

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