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.

A276706 Indices of records in A249860.

Original entry on oeis.org

1, 2, 4, 5, 6, 7, 8, 10, 14, 16, 20, 22, 26, 28, 32, 34, 38, 40, 44, 46, 50, 52, 56, 58, 62, 64, 68, 70, 74, 76, 80, 82, 86, 88, 92, 94, 98, 100, 104, 106, 110, 112, 116, 118, 122, 124, 128, 130, 134, 136, 140, 142, 146, 148, 152, 154, 158, 160, 164, 166
Offset: 1

Views

Author

Colin Barker, Sep 15 2016

Keywords

Comments

The records corresponding to the indices are in A276705.

Crossrefs

Programs

  • PARI
    lista(nn) = {rec = 0; for (n=1, nn, an = lcm(n-3, n+3); if (an > rec, rec = an; print1(n, ", ")););} \\ Michel Marcus, Sep 16 2016

Formula

Conjectures: (Start)
a(n) = a(n-1)+a(n-2)-a(n-3) for n>3.
a(n) = (6*n-27-(-1)^n)/2 for n>6.
G.f.: x*(1+x+x^2-x^4+x^7+3*x^8) / ((1-x)^2*(1+x)).
(End)