A106142 - OEIS

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A106142

Semiprimes (mod 6).

0

4, 0, 3, 4, 2, 3, 3, 4, 1, 2, 3, 4, 5, 2, 3, 4, 1, 3, 1, 3, 4, 2, 5, 3, 2, 5, 4, 1, 2, 3, 1, 3, 4, 5, 4, 3, 1, 4, 5, 1, 2, 3, 3, 1, 2, 3, 4, 5, 1, 2, 5, 2, 3, 5, 4, 1, 3, 4, 3, 5, 1, 2, 3, 4, 5, 1, 2, 5, 3, 4, 5, 1, 2, 3, 5, 4, 1, 3, 1, 3, 1, 2, 1, 4, 1, 3, 4, 2, 5, 1, 3, 1, 4, 5, 1, 2, 3, 5, 3, 2, 1, 3, 5, 2, 3

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..105.

MATHEMATICA

Mod[Select[Range[500], PrimeOmega[#]==2&], 6] (* Harvey P. Dale, Oct 23 2024 *)

CROSSREFS

Sequence in context: A362562 A316260 A119708 * A376994 A092512 A060568

Adjacent sequences: A106139 A106140 A106141 * A106143 A106144 A106145

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta, May 07 2005

STATUS

approved