OFFSET
1,17
FORMULA
MATHEMATICA
Table[Sum[MoebiusMu[n - i]^2 KroneckerDelta[PrimeOmega[i], 2], {i, Floor[n/2]}], {n, 100}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wesley Ivan Hurt, Apr 18 2018
STATUS
approved