-2456

Appears in sequences

• a(n) = (1/2)*(1 + 3*i)^n + (1/2)*(1 - 3*i)^n where i = sqrt(-1).at n=6A120743
• a(n)=(-4)*a(n-1)+8 with a(0)=1.at n=6A165622
• Nearest integer to 1/delta_n, where the delta_n are coefficients in Sitaramachandrarao's series for the Riemann zeta function.at n=13A330552
• a(n) = n! * Sum_{k=0..n} (-1)^(n-k) * binomial(k+2,3) / k!.at n=8A368585