A343883 Numbers k such that A023896(k) is a multiple of A340179(k).

3, 4, 6, 8, 10, 16, 30, 54

Offset

1,1

Comments

Conjecture: there are only 8 terms.

Links

Table of n, a(n) for n=1..8.

Example

a(6) = 16 is a term because A023896(16) = 64 is a multiple of A340179(16) = 32.

Maple

filter:= proc(n) local S, s, t;
  S:= select(t -> igcd(t, n)=1, [$1..n-1]);
  s:= nops(S)*n/2;
  s mod add(s mod t, t=S) = 0;
end proc:
select(filter, [$3..1000]);

Crossrefs

Cf. A023896, A340179.

Sequence in context: A120150 A262892 A109441 * A277319 A176986 A325455

Adjacent sequences: A343880 A343881 A343882 * A343884 A343885 A343886

Keyword

nonn,more

Author

J. M. Bergot and Robert Israel, May 02 2021

Status

approved