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.

A336191 Numbers k of the form k = ab (the decimal concatenation of a and b) such that phi(ab) = a*b + 1.

Table of values

n a(n)
1 57
2 195
3 319
4 5595
5 11709
6 77097
7 114765
8 1313667
9 1348559
10 4752465
11 10219099
12 11031119
13 185573199
14 2918945715
15 3165616929
16 12233666703
17 16996664613
18 18052811909
19 20650199699
20 38081370319
21 58943659521
22 195823876095
23 236323024041
24 242687655369
25 342764528277
26 677924155713

List of values

[57, 195, 319, 5595, 11709, 77097, 114765, 1313667, 1348559, 4752465, 10219099, 11031119, 185573199, 2918945715, 3165616929, 12233666703, 16996664613, 18052811909, 20650199699, 38081370319, 58943659521, 195823876095, 236323024041, 242687655369, 342764528277, 677924155713]