2271915

Appears in sequences

• a(n) = n*2^(n+1) + (2^(n+3)+(-1)^n)/3.at n=16A191007
• Expansion of (2 + 6*x + 3*x^2 +4*x^3 - 10*x^4)/(1 - x - 4*x^4 + 4*x^5).at n=39A309792