A341061 Numbers k such that A340179(k) is prime.

5, 28, 44, 51, 58, 61, 63, 90, 93, 108, 129, 136, 145, 148, 186, 208, 234, 235, 241, 247, 262, 272, 277, 278, 300, 306, 310, 314, 316, 321, 329, 335, 379, 384, 386, 414, 428, 446, 448, 449, 475, 480, 492, 514, 535, 537, 546, 548, 572, 580, 599, 609, 611, 616, 618, 626, 660, 670, 673, 680, 683

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..3000

Example

a(3) = 44 is a term because A340179(44) = 211 is prime.

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 -> isprime(f(t)), [$1..1000]);

Crossrefs

Cf. A340179, A341059, A341060.

Sequence in context: A345263 A218346 A106679 * A161165 A063140 A316560

Adjacent sequences: A341058 A341059 A341060 * A341062 A341063 A341064

Keyword

nonn

Author

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

Status

approved