OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MAPLE
with(numtheory): seq( `if`((sigma(i) > sigma(i+1)), (sigma(i) - sigma(i+1)), print( )), i=1..200);
MATHEMATICA
Abs[Select[Differences[DivisorSigma[1, Range[200]]], #<0&]] (* Harvey P. Dale, Apr 17 2022 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Asher Auel, Jan 06 2000
STATUS
approved