A343904 Composite numbers k such that k is divisible by A318996(k).

4, 45, 304, 464, 1870, 6048, 14421, 119072, 130304, 561824, 1736150, 8124416, 9519296, 16303104, 26409026

Offset

1,1

Links

Table of n, a(n) for n=1..15.

Example

a(4) = 464 is a member because it is composite and is divisible by A318996(k) = 16.

Maple

filter:= proc(n) local D, s, d, v;
  if isprime(n) then return false fi;
D:= numtheory:-divisors(n);
s:= convert(D, `+`);
v:= add(s mod d, d = D);
  v > 0 and n mod v = 0
end proc:
select(filter, [$4..3*10^7]);

Crossrefs

Cf. A318996.

Sequence in context: A123650 A371003 A122910 * A117644 A232729 A055602

Adjacent sequences: A343901 A343902 A343903 * A343905 A343906 A343907

Keyword

nonn,more

Author

J. M. Bergot and Robert Israel, May 03 2021

Status

approved