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 A175141 a(1)=2. a(n) = the smallest integer > a(n-1) that is not equal to the sum of the divisors of any earlier term. 1
 2, 4, 5, 8, 9, 10, 11, 14, 16, 17, 19, 21, 22, 23, 25, 26, 27, 28, 29, 33, 34, 35, 37, 39, 41, 43, 45, 46, 47, 49, 50, 51, 52, 53, 55, 58, 59, 61, 63, 64, 65, 66, 67, 69, 70, 71, 73, 75, 76, 77, 79, 81, 82, 83, 85, 86, 87, 88, 89, 91, 92, 94, 95, 97, 99, 100, 101, 103, 105, 106 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS If a positive integer n occurs in the sequence, then sigma(n) does not, where sigma(m) = A000203(m). sigma(a(m)) = A175142(m). LINKS Table of n, a(n) for n=1..70. CROSSREFS Cf. A175142, A000203. Sequence in context: A035262 A010440 A072008 * A072756 A325429 A004761 Adjacent sequences: A175138 A175139 A175140 * A175142 A175143 A175144 KEYWORD nonn AUTHOR Leroy Quet, Feb 23 2010 EXTENSIONS Extended by Ray Chandler, Mar 06 2010 STATUS approved

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Last modified September 11 15:50 EDT 2024. Contains 375836 sequences. (Running on oeis4.)