OFFSET
1,1
COMMENTS
Chowla's function (A048050) = sum of divisors of n except 1 and n.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MAPLE
with(numtheory):
[seq(`if`((sigma(i)-i-1) mod (tau(i)-1)=0, i, print( )), i=2..1000)];
MATHEMATICA
Select[Range[2, 150], Divisible[DivisorSigma[1, #]-1-#, DivisorSigma[ 0, #]-1]&] (* Harvey P. Dale, Aug 13 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Asher Auel, Jan 19 2000
STATUS
approved