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.

A202728 Records in A067513.

Original entry on oeis.org

1, 2, 3, 5, 7, 8, 9, 11, 13, 14, 15, 16, 18, 19, 20, 22, 23, 27, 28, 31, 36, 39, 41, 43, 45, 47, 48, 50, 52, 54, 57, 60, 62, 67, 73, 74, 76, 79, 82, 83, 85, 86, 88, 89, 93, 98, 101, 102, 109, 111, 117, 120, 134, 136, 143, 151, 158, 160, 166, 167, 192, 202, 221
Offset: 1

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Keywords

Crossrefs

Programs

  • PARI
    r=0;for(n=1,1e8,t=sumdiv(n,d,isprime(d+1));if(t>r,r=t;print1(t", ")))

Formula

a(n) = A067513(A202727(n)).