1,4

Table of n, a(n) for n=1..70.

Index entries for sequences related to partitions

a(n) = Sum_{i=1..n-1} mu(i)^2 * mu(2n-i)^2, where mu is the Möbius function (A008683).

Table[Sum[MoebiusMu[i]^2*MoebiusMu[2 n - i]^2, {i, n - 1}], {n, 80}]

(PARI) A294248(n)=sum(i=1, n-1, moebius(i)^2*moebius(2*n-i)^2); \\ R. J. Cano, Oct 25 2017

Cf. A008683, A280226.

Sequence in context: A126208 A287863 A126088 * A085671 A126324 A035557

Adjacent sequences: A294245 A294246 A294247 * A294249 A294250 A294251

nonn,easy

Wesley Ivan Hurt, Oct 25 2017

approved