A204984 a(n) = (1/n)*A204983(n).

1, 1, 1, 1, 3, 1, 1, 1, 7, 3, 93, 1, 315, 1, 1, 1, 15, 7, 13797, 3, 3, 93, 89, 1, 41943, 315, 9709, 1, 9256395, 1, 1, 1, 31, 15, 117, 7, 1857283155, 13797, 105, 3, 25575, 3, 381, 93, 91, 89, 178481, 1, 42799, 41943, 5, 315, 84973577874915, 9709, 19065, 1, 4599, 9256395

Offset: 1

Author

Clark Kimberling, Jan 21 2012

Keywords

• nonn

Comments

For a guide to related sequences, see A204892.

Crossrefs

Cf. A204979, A204892, A204983.

Cf. A023758 (when a(n)=1).

Programs

Mathematica

(See the program at A204979.)

PARI

a(n) = for (k=1, oo, for (j=1, k-1, my(d=2^(k-1)-2^(j-1)); if (!(d % n), return(d/n)););); \\ Michel Marcus, Sep 16 2023

Extensions

More terms from Michel Marcus, Sep 16 2023