A182391 Numbers n for which A104272(n) = A080359(n).

1, 9, 11, 18, 22, 23, 25, 30, 32, 34, 35, 37, 38, 41, 46, 47, 48, 49, 52, 53, 54, 63, 64, 66, 70, 75, 76, 79, 80, 82, 84, 94, 98, 99, 101, 102, 105, 108, 109, 110, 113, 114, 115, 124, 127, 128, 131, 135, 136, 139, 140, 148, 149, 150, 151, 154, 156, 158, 160

Offset

1,2

Comments

Number m is in the sequence iff 1) there exists only composite number k such that 2*k-1 is prime and A060715(k)=m; 2) there is no prime p such that 2*p-1 is prime and A060715(p)=m-1.

Links

Table of n, a(n) for n=1..59.

Formula

A194217(n)=0.

Crossrefs

Cf. A104272, A080359, A164554, A193507, A194184, A194186, A194217, A182366.

Sequence in context: A077788 A339048 A137018 * A346465 A263722 A299971

Adjacent sequences: A182388 A182389 A182390 * A182392 A182393 A182394

Keyword

nonn

Author

Vladimir Shevelev, Apr 27 2012

Status

approved