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 A111655 n-th composite number appears n-th composite number times. 5
 4, 4, 4, 4, 6, 6, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES T. M. Apostol, Introduction to Analytic Number Theory, Springer-Verlag, 1976, page 2. J. B. Rosser and L. Schoenfeld, Approximate formulas for some functions of prime numbers, Illinois J. Math. 6: 64-94 (1962). L. Panaitopol, Some Properties of the Series of Composed [Composite] Numbers, J. Inequalities in Pure and Applied Mathematics. 2(2): Article 38, 2000. LINKS Eric Weisstein's World of Mathematics, Composite Number." FORMULA A002808(n) appears A002808(n) times. CROSSREFS Cf. A002808, A111653, A111654. Sequence in context: A140744 A179414 A139324 * A175961 A113646 A106325 Adjacent sequences:  A111652 A111653 A111654 * A111656 A111657 A111658 KEYWORD easy,nonn AUTHOR Jonathan Vos Post, Aug 12 2005 STATUS approved

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Last modified December 7 12:17 EST 2021. Contains 349581 sequences. (Running on oeis4.)