A320062 Nonprimes with odd digits only.

1, 9, 15, 33, 35, 39, 51, 55, 57, 75, 77, 91, 93, 95, 99, 111, 115, 117, 119, 133, 135, 153, 155, 159, 171, 175, 177, 195, 315, 319, 333, 335, 339, 351, 355, 357, 371, 375, 377, 391, 393, 395, 399, 511, 513, 515, 517, 519, 531, 533, 535, 537, 539, 551, 553, 555

Offset

1,2

Links

Table of n, a(n) for n=1..56.

Prog

(PARI) isok(n) = !isprime(n) && (d=digits(n)) && (#select(x->x%2, d) == #d); \\ Michel Marcus, Oct 05 2018

Crossrefs

Intersection of A018252 and A014261.

Supersequence of A062016.

Sequence in context: A124580 A103508 A051246 * A062016 A108637 A091296

Adjacent sequences: A320059 A320060 A320061 * A320063 A320064 A320065

Keyword

nonn,base

Author

Enrique Navarrete, Oct 04 2018

Status

approved