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.

A103692 Row sums of A103691.

Original entry on oeis.org

1, 2, 4, 6, 11, 16, 24, 44, 59, 124, 122, 372, 357, 966, 898, 3926, 1634, 13660, 6207, 32656
Offset: 2

Views

Author

Wouter Meeussen, Feb 12 2005

Keywords

Crossrefs

Programs

  • Mathematica
    (* first do *) Needs["DiscreteMath`Combinatorica`"] (* then *) f[bi_] := DeleteCases[ bi*Range[ Length[bi]], 0]; vec[li_, l_]:= Abs[Plus @@ N[Exp[2*Pi*I*f[li]/l], 24]]; Plus @@@ Table[ Length[ Union[(vec[ #, n]&)/@ ListNecklaces[n, Join[1+0*Range[i], 0*Range[n-i]], Dihedral], SameTest ->(Abs[ #1 - #2] < 10^-18 &)]], {n, 2, 17}, {i, n-1}]

Extensions

a(17)-a(21) from Robert G. Wilson v, Feb 14 2005