-2097152

Appears in sequences

• Berstel sequence: a(n+1) = 2*a(n) - 4*a(n-1) + 4*a(n-2).at n=28A007420
• Expansion of (1 - 2*x -x^4)/(1 - 2*x)^2 in powers of x.at n=23A008936
• Expansion of e.g.f.: 1/2 + exp(-4*x)/2.at n=11A009117
• Triangle T(n,k) read by rows: coefficients of a polynomial sequence occurring when calculating the n-th derivative of Lambert function W.at n=28A042977
• Expansion of 1/(1+2*x^3).at n=63A077959
• Expansion of 1/(1+2*x^2).at n=42A077966
• Expansion of (1-x)/(1+2*x+2*x^2).at n=43A078069
• Inverse binomial transform of A084101.at n=42A084102
• Generalized Gaussian Fibonacci integers.at n=22A088138
• Expansion of (1+2*x)/(1+2*x+2*x^2).at n=42A090132
• Array read by rows, starting with n=0: row n lists A057077(n+1)*8^(n+1)/2, A057077(n+2)*8^(n+1)/2, A057077(n+1)*8^(n+1).at n=20A096252
• Hankel transform of sequence (b(n)) where b(n) = Sum_{i=0..n} binomial(2*i,i).at n=21A098106
• a(n) = 2^floor(n/2)*((-1)^floor(n/2) + (-1)^n)/2.at n=43A102561
• Expansion of g.f. (1+x)/(1+2*x+4*x^2).at n=22A104537
• Expansion of 1/(1+2*x+2*x^2).at n=41A108520
• Triangle T, read by rows, where matrix power T^2 has 2*4^n in the secondary diagonal: [T^2](n+1,n) = 2*4^n, with all 1's in the main diagonal and zeros elsewhere.at n=33A117258
• Hankel transform of Sum_{k=0..n} C(2k,k).at n=21A120580
• Hankel transform of g.f. 1/sqrt(1+4x^2).at n=21A120617
• Powers of -2: a(n) = (-2)^n.at n=21A122803
• Expansion of (1+3*x)/(1+2*x).at n=22A123344