-524289

Appears in sequences

• A sequence of triples arising from a matrix calculation, in particular let m = floor(n/3), then (a(3*m), a(3*m+1), a(3*m+2)) = M^(m*(m+1)/n) * (0, 1, 1) where M is the matrix [[2,0,1], [0,1,0], [-2,1,0]].at n=26A103193
• a(2*n) = -(2^(2*n+1) + 1), a(2*n+1) = (2^(n+1) - (-1)^n)^2.at n=18A105951
• Expansion of e.g.f. (1 + sin(x))/exp(x).at n=39A321632