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A152081 Least prime divisor of terms of A152080. 0
5, 7, 3, 7, 5, 3, 11, 3, 5, 7, 3, 11, 13, 3, 7, 3, 3, 5, 5, 3, 5, 3, 13, 17, 3, 7, 11, 5, 7, 5, 3, 3, 7, 5, 3, 11, 5, 5, 19, 7, 5, 29, 3, 3, 11, 5, 5, 7, 11, 3, 7, 29, 5, 3, 3, 19, 3, 3, 3, 13, 5, 7, 29, 7, 31, 3, 23, 17, 13, 13, 3, 19, 3, 3, 7, 3, 5, 7, 3, 11, 11, 29, 37 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..83.

PROG

(PARI) a000695(n) = fromdigits(binary(n), 4);

lista(nn) = forcomposite(n=1, nn, if (isprime(a000695(n)), print1(factor(n)[1, 1], ", "))); \\ Michel Marcus, Dec 18 2018

CROSSREFS

Cf. A152080, A000625, A152021, A152022, A152023, A152078.

Sequence in context: A019844 A155529 A261624 * A264736 A200620 A195389

Adjacent sequences:  A152078 A152079 A152080 * A152082 A152083 A152084

KEYWORD

nonn

AUTHOR

Vladimir Shevelev, Nov 23 2008

EXTENSIONS

More terms from Michel Marcus, Jun 02 2013

More terms from Michel Marcus, Dec 18 2018

STATUS

approved

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Last modified April 22 06:14 EDT 2019. Contains 322329 sequences. (Running on oeis4.)