A175961 - OEIS

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A175961

n-th nonprime number appears n-th nonprime numbers times.

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: A361248 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