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%I #6 Nov 21 2013 12:48:58
%S 0,1,1,1,2,1,2,1,1,2,1,2,1,2,3,3,3,1,2,3,1,2,2,1,2,2,2,2,3,2,1,3,1,1,
%T 2,2,3,2,2,3,2,2,2,2,3,1,4,2,1,2,2,2,2,1,3,2,4,2,1,3,3,2,1,2,2,2,3,1,
%U 1,3,1,2,3,4,3,1,3,1,1,2,1,2,2,2,3,3
%N Number of prime factors (with multiplicity) of n^4 + 3*n^2 + 1 (A057721).
%F a(n) = Bigomega(n^4 + 3*n^2 + 1) = A001222(A057721(n)).
%t Table[PrimeOmega[n^4+3n^2+1],{n,0,100}] (* _Harvey P. Dale_, Apr 25 2011 *)
%Y Cf. A001222, A057721, A120062.
%K easy,nonn
%O 0,5
%A _Jonathan Vos Post_, Jun 11 2006
%E More terms from Harvey P. Dale, Apr 25 2011.