-4691

Appears in sequences

• a(n) = 7 + 12*n - 6*n^2.at n=29A157517
• a(n) = A218542(n) - A218543(n).at n=19A257259
• L.g.f.: Sum_{n>=1} (x - x^(2*n-1))^(2*n-1) / (2*n-1).at n=42A293597
• Expansion of Product_{k>=1} (1 - x^k)^A000593(k).at n=29A316366