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.

A029570 Quasi-Carmichael numbers to base -10: squarefree composites n such that prime p|n ==> p+10|n+10.

Original entry on oeis.org

935, 65195, 861851, 1486895, 3061265, 4497686, 5164226, 5322419, 6153830, 8547998, 9125855, 22050809, 22734611, 25345310, 32812406, 40860755, 45631898, 50315135, 51436130, 61532153, 74613347, 81080990, 86724215, 94903370
Offset: 1

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Programs

  • Mathematica
    qcp[n_, d_] := Block[{p, e}, {p, e} = Transpose@FactorInteger@n;
    Length[p] > 1 && Max[e] == 1 && And @@ IntegerQ /@ ((n + d)/(p + d))]; Select[Range[10^6], qcp[#, 10] &] (* Giovanni Resta, May 21 2013 *)