A247892 Number of nonprimes in n-th row of triangle A077581.

1, 1, 2, 1, 3, 1, 4, 3, 4, 3, 7, 3, 8, 5, 8, 6, 11, 4, 12, 7, 11, 9, 15, 6, 15, 12, 16, 12, 20, 4, 21, 15, 19, 16, 22, 10, 26, 18, 23, 17, 29, 11, 30, 22, 24, 24, 33, 16, 34, 22, 31, 25, 38, 19, 36, 27, 35, 30, 43, 15, 44, 33, 36, 34, 44, 22, 49, 36, 43, 27

Offset

1,3

Comments

a(n) = n - A247815(n)

Links

Table of n, a(n) for n=1..70.

Prog

(Haskell)
a247892 n = n - a247815 n

Crossrefs

Cf. A077581, A247815.

Sequence in context: A020952 A332294 A079554 * A366649 A079880 A366291

Adjacent sequences: A247889 A247890 A247891 * A247893 A247894 A247895

Keyword

nonn

Author

Reinhard Zumkeller, Sep 26 2014

Status

approved