0,2

A008683(a(n) + k) = A008683(a(n)) for 0<=k<=n.

a(4) = 844:

A008683(844) = A008683(2*2*211) = 0;

A008683(844+1) = A008683(5*13*13) = 0;

A008683(844+2) = A008683(2*3*3*47) = 0;

A008683(844+3) = A008683(7*11*11) = 0;

A008683(844+4) = A008683(2*2*2*2*53) = 0.

Sequence in context: A009772 A020460 A036939 this_sequence A077023 A101750 A160952

Adjacent sequences: A124298 A124299 A124300 this_sequence A124302 A124303 A124304

nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 25 2006

2 more terms from Peter T. Wang (peterw(AT)ugcs.caltech.edu), Feb 04 2007