A231567 Numbers n such that A231566(n) <> n.

6, 10, 12, 18, 21, 36, 40, 42, 48, 50, 54, 55, 70, 78, 80, 84, 90, 96, 105, 108, 110, 114, 126, 136, 144, 147, 150, 156, 160, 162, 165, 168, 170, 171, 186, 189, 190, 200, 210, 220, 222, 228, 234, 250, 252, 253, 258, 270, 272, 273, 275, 280, 288, 290, 294

Offset

1,1

Links

Table of n, a(n) for n=1..55.

Mathematica

Su[n_] := Su[n] = Mod[Sum[GCD[i, n]*PowerMod[i, n, n], {i, 1, n}], n]; Select[Range[400], ! Su[2#] == # &]

Crossrefs

Cf. A231566.

Sequence in context: A110085 A315126 A315127 * A114520 A315128 A315129

Adjacent sequences: A231564 A231565 A231566 * A231568 A231569 A231570

Keyword

nonn

Author

José María Grau Ribas, Feb 01 2014

Status

approved