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A175961 n-th nonprime number appears n-th nonprime numbers times. 0
1, 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

1,2

COMMENTS

A018252(n) appears A018252(n) times; 1 appears once, n-th composite number appears n-th composite number times; 1 together with A111655.

LINKS

Table of n, a(n) for n=1..79.

FORMULA

a(1)=1, a(n+1)=A111655(n).

CROSSREFS

Cf. A063905, A141468, A175944.

Sequence in context: A179414 A139324 A111655 * A113646 A106325 A159835

Adjacent sequences:  A175958 A175959 A175960 * A175962 A175963 A175964

KEYWORD

nonn,easy,less

AUTHOR

Juri-Stepan Gerasimov, Oct 31 2010

STATUS

approved

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Last modified January 24 19:03 EST 2022. Contains 350565 sequences. (Running on oeis4.)