A106143 - OEIS

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A106143

Semiprimes (mod 7).

1

4, 6, 2, 3, 0, 1, 0, 1, 4, 5, 5, 6, 0, 3, 4, 4, 0, 2, 6, 1, 2, 6, 2, 6, 4, 0, 5, 1, 2, 3, 0, 2, 3, 4, 1, 6, 3, 6, 0, 2, 3, 4, 3, 0, 1, 1, 2, 3, 5, 6, 1, 4, 5, 0, 5, 1, 2, 3, 1, 3, 5, 5, 5, 6, 0, 2, 3, 6, 3, 4, 5, 0, 1, 2, 4, 2, 4, 6, 2, 4, 1, 2, 0, 3, 6, 1, 1, 5, 0, 2, 4, 1, 4, 5, 0, 1, 2, 4, 1, 6, 4, 6, 1, 4, 5

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OFFSET

1,1

LINKS

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

MATHEMATICA

Mod[Select[Range[400], PrimeOmega[#]==2&], 7] (* Harvey P. Dale, Aug 25 2024 *)

CROSSREFS

Sequence in context: A154892 A286155 A195860 * A359283 A255524 A077158

Adjacent sequences: A106140 A106141 A106142 * A106144 A106145 A106146

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta, May 07 2005

STATUS

approved