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A085075

Smallest number a(n) == -1 (mod n) such that the prime signature of n and a(n) is the same, or 0 if no such number exists.

3, 2, 0, 19, 35, 13, 343, 0, 39, 43, 275, 103, 55, 14, 0, 67, 539, 37, 99, 62, 21, 137, 2375, 49, 51, 4913, 279, 173, 2639, 61, 0, 65, 33, 34, 0, 73, 265, 38, 999, 163, 1595, 257, 175, 44, 91, 281, 29375, 0, 99, 203, 207, 211, 2375, 219, 783, 341, 57, 353, 14399, 487, 123

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OFFSET

2,1

LINKS

Table of n, a(n) for n=2..62.

EXAMPLE

a(6) =35 = 6*6 -1 = 3*13 and 6 = 2*3 are both of prime signature p*q, where p and q are primes.

CROSSREFS

Cf. A085074.

Sequence in context: A371025 A244134 A105629 * A321518 A267883 A333437

Adjacent sequences: A085072 A085073 A085074 * A085076 A085077 A085078

KEYWORD