OFFSET
1,4
FORMULA
a(n) = Sum_{i=1..n-1} mu(i)^2 * mu(2n-i)^2, where mu is the Möbius function (A008683).
MATHEMATICA
Table[Sum[MoebiusMu[i]^2*MoebiusMu[2 n - i]^2, {i, n - 1}], {n, 80}]
PROG
(PARI) A294248(n)=sum(i=1, n-1, moebius(i)^2*moebius(2*n-i)^2); \\ R. J. Cano, Oct 25 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wesley Ivan Hurt, Oct 25 2017
STATUS
approved