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A237878
Composite numbers n such that n | A072514 (n).
0
4, 16, 22, 34, 108, 121, 187, 232, 289, 300, 372, 2230, 4322, 8882, 23771, 36737, 48851, 50946, 67650, 75497, 424689, 482998, 581765, 4669921, 7374225, 9597001, 19722481, 110714642, 416101557, 1478286411, 1773582750
OFFSET
1,1
COMMENTS
a(24) > 3000000. - Giovanni Resta, Feb 17 2014
a(32) > 4 * 10^9. - Hiroaki Yamanouchi, Oct 01 2014
EXAMPLE
The unrelated numbers to 16 are 6, 10, 12 and 14.
The remainders when 16 is divided by these numbers are 4, 6, 4, 2.
Their sum is 16 and 16 / 16 = 1.
MAPLE
P:=proc(q) local i, n, t; for n from 2 to q do if not isprime(n) then t:=0;
for i from 1 to n-1 do if not gcd(i, n)=1 then if not type(n/i, integer) then t:=t+(n mod i); fi; fi; od;
if type(t/n, integer) then print(n); fi; fi; od; end: P(10^6);
CROSSREFS
Cf. A072514.
Sequence in context: A067671 A227815 A075331 * A065661 A100275 A307165
KEYWORD
nonn,more
AUTHOR
Paolo P. Lava, Feb 14 2014
EXTENSIONS
a(16)-a(23) from Giovanni Resta, Feb 17 2014
a(24)-a(28) from Hiroaki Yamanouchi, Oct 01 2014
a(29)-a(31) from Hiroaki Yamanouchi, Sep 27 2015
STATUS
approved