A106141 Semiprimes (mod 5).

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

Offset

1,1

Links

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

Mathematica

Mod[Select[Range[400], PrimeOmega[#]==2&], 5] (* Harvey P. Dale, Nov 17 2013 *)

Crossrefs

Cf. A001358.

Sequence in context: A143354 A324026 A171539 * A082999 A308255 A333240

Adjacent sequences: A106138 A106139 A106140 * A106142 A106143 A106144

Keyword

nonn

Author

Shyam Sunder Gupta, May 07 2005

Status

approved