A354166 - OEIS

A354166

Number of nonprimes among first n terms of A090252.

1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 13, 13, 13, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16, 17

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OFFSET

1,5

COMMENTS

It appears that this sequence controls the growth of A090252. That is, almost all the terms of A090252 lie on the line A090252(n) = k-th prime, where k = n - a(n).

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 1..34886

CROSSREFS

Cf. A090252, A354164, A354165.

Sequence in context: A101402 A156251 A116458 * A331854 A093875 A329242

Adjacent sequences: A354163 A354164 A354165 * A354167 A354168 A354169

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 31 2022

STATUS

approved