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 A065090 Natural numbers which are not odd primes: composites plus 1 and 2. 19
 1, 2, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Harry J. Smith, Table of n, a(n) for n = 1..1000 FORMULA A151763(a(n)) = 0. PROG (PARI) { n=0; for (m=1, 10^9, if (!isprime(m) || m==2, write("b065090.txt", n++, " ", m); if (n==1000, return)) ) } \\ Harry J. Smith, Oct 06 2009 (Haskell) import Data.List (elemIndices) a065090 n = a065090_list !! (n-1) a065090_list = map (+ 1) \$ elemIndices 0 a151763_list -- Reinhard Zumkeller, Oct 06 2011 CROSSREFS Cf. A002808, A006005. Complement of A065091. Sequence in context: A189466 A085492 A338924 * A324560 A227197 A285517 Adjacent sequences:  A065087 A065088 A065089 * A065091 A065092 A065093 KEYWORD nonn,easy AUTHOR Labos Elemer, Nov 12 2001 STATUS approved

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Last modified July 23 22:20 EDT 2021. Contains 346265 sequences. (Running on oeis4.)