The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #8 Mar 11 2014 01:32:25
%S 0,1,2,0,4,2,6,4,0,6,10,3,12,10,6,0,16,9,18,4,12,18,22,8,0,22,18,12,
%T 28,5,30,16,24,30,10,0,36,34,30,15,40,6,42,28,20,42,46,12,0,25,42,36,
%U 52,18,30,7,48,54,58,24,60,58,14,0,40,30,66,52,60,21,70,8,72,70,50,60,28,42
%N If k is the largest divisor of n that is <= sqrt(n) then a(n) = n - k^2.
%C a(p) = p-1 for all primes p. a(n^2) = 0 for all positive integers n.
%Y Cf. A139717, A033676.
%K nonn
%O 1,3
%A _Leroy Quet_, May 01 2008
%E Extended by _Ray Chandler_, Jul 01 2009