45517

Appears in sequences

• a(n) = (n*3^(n+1)+((5*3^(n+1)+(-1)^(n))/4))/4.at n=8A191008
• Triangle read by rows: T(n,k) is the coefficient A_k in the transformation Sum_{k=0..n} (k+1)*x^k = Sum_{k=0..n} A_k*(x+3)^k.at n=36A246798
• Triangle read by rows: T(n,k) is the coefficient A_k in the transformation of 1 + x + x^2 + ... + x^n to the polynomial A_k*(x+3)^k for 0 <= k <= n.at n=46A248811
• a(n) = numerator(Sum_{k=1..n} (2^k-2)/k).at n=11A330718
• Expansion of 1/sqrt((1 - x^3 - x^4)^2 - 4*x^7).at n=34A376721