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.

A235695 Semiprimes which have one or more occurrences of exactly seven different digits.

Original entry on oeis.org

1023469, 1023479, 1023547, 1023574, 1023586, 1023647, 1023649, 1023657, 1023689, 1023745, 1023746, 1023749, 1023794, 1023847, 1023879, 1023965, 1023985, 1024367, 1024369, 1024537, 1024538, 1024563, 1024567, 1024583, 1024637, 1024679, 1024687, 1024735
Offset: 1

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Author

Colin Barker, Jan 14 2014

Keywords

Crossrefs

Programs

  • PARI
    list(lim)=my(v=List(), t); forprime(p=2, sqrt(lim), t=p; forprime(q=p, lim\t, listput(v, t*q))); vecsort(Vec(v)) \\ From A001358
    b=list(1030000); s=[]; for(n=1, #b, if(#vecsort(eval(Vec(Str(b[n]))),,8)==7, s=concat(s, b[n]))); s