A352710 Least k such that A352483(k) = 2*n-1, or -1 if no such k exists.

3, 5, 7, 20, 11, 13, 32, 17, 19, 44, 23, 27, 216, 29, 31, 35, 280, 37, 117, 41, 43, 92, 47, 51, 153, 53, 57, 116, 59, 61, 65, 520, 67, 207, 71, 73, 77, 616, 79, 164, 83, 87, 261, 89, 93, 95, 760, 97, 105, 101, 103, 212, 107, 109, 333, 113, 920, 119, 952, 123, 125, 1000, 127, 135, 131

Offset

1,1

Links

Michel Marcus, Table of n, a(n) for n = 1..10000

Formula

a(n) = A351913(2*n-1).

Prog

(PARI) f(n) = my(d=numdiv(n)); denominator(n*d/(n-d)); \\ A352483
a(n) = {my(k=3, q=2*n-1); while (f(k) != q, k++); k; }

Crossrefs

Cf. A352483.

Bisection of A351913.

Sequence in context: A072002 A217651 A362417 * A163637 A336985 A360929

Adjacent sequences: A352707 A352708 A352709 * A352711 A352712 A352713

Keyword

nonn

Author

Michel Marcus, Mar 30 2022

Status

approved