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 A267895 Numbers whose number of odd divisors is prime. 1
 3, 5, 6, 7, 9, 10, 11, 12, 13, 14, 17, 18, 19, 20, 22, 23, 24, 25, 26, 28, 29, 31, 34, 36, 37, 38, 40, 41, 43, 44, 46, 47, 48, 49, 50, 52, 53, 56, 58, 59, 61, 62, 67, 68, 71, 72, 73, 74, 76, 79, 80, 81, 82, 83, 86, 88, 89, 92, 94, 96, 97, 98, 100, 101, 103, 104, 106, 107, 109 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All odd primes are in the sequence. LINKS EXAMPLE The divisors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36. The odd divisors of 36 are 1, 3, 9. There are 3 odd divisors of 36 and 3 is prime, so 36 is in the sequence. PROG (PARI) isok(n) = isprime(sumdiv(n, d, (d%2))); \\ Michel Marcus, Apr 04 2016 CROSSREFS Complement of A267894. Cf. A000040, A001227, A028982, A028983, A038550, A065091, A072502, A266531, A267696, A267697. Sequence in context: A277727 A080943 A052294 * A216189 A191916 A254614 Adjacent sequences:  A267892 A267893 A267894 * A267896 A267897 A267898 KEYWORD nonn AUTHOR Omar E. Pol, Apr 04 2016 STATUS approved

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Last modified December 10 20:23 EST 2019. Contains 329909 sequences. (Running on oeis4.)