login
A119672
Number of prime factors (with multiplicity) of n^4 + 3*n^2 + 1 (A057721).
0
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, 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, 1, 3, 1, 2, 3, 4, 3, 1, 3, 1, 1, 2, 1, 2, 2, 2, 3, 3
OFFSET
0,5
FORMULA
a(n) = Bigomega(n^4 + 3*n^2 + 1) = A001222(A057721(n)).
MATHEMATICA
Table[PrimeOmega[n^4+3n^2+1], {n, 0, 100}] (* Harvey P. Dale, Apr 25 2011 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Jun 11 2006
EXTENSIONS
More terms from Harvey P. Dale, Apr 25 2011.
STATUS
approved