614547

Appears in sequences

• a(n) = 3*a(n-1) - 3*a(n-2) + 3*a(n-3), with a(0)=1, a(1)=3, a(2)=1.at n=21A136297
• a(n) = (n^2 + 4*n + 6) * n^2.at n=27A258402