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.

A085822 Smallest prime with n prime substrings (excluding prime itself but allowing leading zeros).

Original entry on oeis.org

2, 13, 23, 113, 137, 373, 1973, 1733, 1373, 10337, 10313, 31379, 37337, 113173, 211373, 313739, 337397, 1113173, 1003733, 2313797, 2337397, 10003733, 11031373, 11373379, 33133733, 20037337, 100037339, 103137337
Offset: 0

Views

Author

Zak Seidov, Jul 04 2003

Keywords

Examples

			a(5)=373 because it is prime and has 5 prime substrings: 3,7,3,37,73.
		

Crossrefs

Cf. A085823.

Programs

  • Maple
    V:= Array(0..27): count:= 0:
    p:= 1:
    while count < 28 do
      p:= nextprime(p);
      v:= nps(p);
      if v <= 100 and V[v] = 0 then V[v]:= p; count:= count+1 fi
    od:
    convert(V,list); # Robert Israel, Mar 03 2023

Extensions

More terms from Robert Israel, Mar 03 2023