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.

A269930 Primes whose digits are all prime, sum of digits is prime and sum of reciprocals of digits is also prime.

Table of values

n a(n)
1 32233
2 32323
3 33223
4 2222333
5 2223233
6 2232323
7 2233223
8 3223223
9 272777777
10 277727777
11 722777777
12 772277777
13 772777727
14 777727277
15 777777227
16 33333555553
17 33355535533
18 33355553353
19 33533555353
20 33553353553
21 33553553353
22 33553553533
23 33555353353
24 33555533533
25 35335355353
26 35335533553
27 35353335553

List of values

[32233, 32323, 33223, 2222333, 2223233, 2232323, 2233223, 3223223, 272777777, 277727777, 722777777, 772277777, 772777727, 777727277, 777777227, 33333555553, 33355535533, 33355553353, 33533555353, 33553353553, 33553553353, 33553553533, 33555353353, 33555533533, 35335355353, 35335533553, 35353335553]

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

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