A341059 Numbers k such that A340179(k) is a square.

1, 2, 3, 4, 6, 8, 11, 12, 15, 17, 27, 48, 92, 6219, 24310

Offset

1,2

Links

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

Example

a(6) = 8 is a term because A340179(8) = 4 = 2^2.

Maple

f:= proc(n) local C, s, c;
  C:=select(t -> igcd(t, n) = 1, [$1..n-1]);
  s:= convert(C, `+`);
  add(s mod c, c = C)
end proc:
select(t -> issqr(f(t)), [$1..7000]);

Crossrefs

Cf. A340179, A341060, A341061.

Sequence in context: A257121 A039500 A160649 * A190203 A034034 A353721

Adjacent sequences: A341056 A341057 A341058 * A341060 A341061 A341062

Keyword

nonn,more

Author

J. M. Bergot and Robert Israel, Feb 04 2021

Status

approved