-33554432

Appears in sequences

• Expansion of e.g.f.: 1/2 + exp(-4*x)/2.at n=13A009117
• Expansion of 1/(1+2*x^2).at n=50A077966
• Expansion of (1-2*x)/(1-8*x^2).at n=17A094014
• Determinant of n X n partial Hadamard matrix with coefficient m(i,j) 1<=i,j<=n (see comment).at n=13A094384
• a(n) = 2^floor(n/2)*((-1)^floor(n/2) + (-1)^n)/2.at n=51A102561
• Expansion of g.f. (1+x)/(1+2*x+4*x^2).at n=26A104537
• Hankel transform of g.f. 1/sqrt(1+4x^2).at n=25A120617
• Powers of -2: a(n) = (-2)^n.at n=25A122803
• Expansion of (1+3*x)/(1+2*x).at n=26A123344
• Expansion of (1-4*x)/(1-2*x+4*x^2).at n=25A128018
• Hankel transform of A115962.at n=25A128063
• Expansion of (1-x)/(1 - 2*x + 4*x^2).at n=26A138230
• Inverse binomial transform of A001651.at n=27A141531
• Inverse binomial transform of A070366.at n=26A146321
• a(n) = A154570(n) + A154570(n+1).at n=26A154589
• a(n) = A156591(n) + A156591(n+1).at n=26A157823
• A002321*A000079.at n=24A162459
• A002321*A000079.at n=25A162459
• A (3/2,-1) Somos-4 sequence.at n=26A174882
• Chapman's "evil" determinants II.at n=14A179072