78313

Appears in sequences

• Expansion of Sum_{i>=1} mu(i)^2*x^i/(1 - x^i) / Product_{j>=1} (1 - mu(j)^2*x^j), where mu() is the Moebius function (A008683).at n=37A281572
• Numbers k that are a substring of (k-1)*k*(k+1).at n=19A316943