-5844

Appears in sequences

• Expansion of (1+4x-sqrt(1+4x^2))/(4+6x) in powers of x.at n=25A086990
• A Chebyshev transform of 2^n.at n=24A090412
• Expansion of 1/(1+3*x*c(x)), c(x) the g.f. of Catalan numbers A000108.at n=12A126982
• Triangle of coefficients of characteristic polynomials of anti-symmetrical tridiagonal matrices: Middle diagonal: a=1; Lower first subdiagonal: b=2; Upper first subdiagonal: c=-2; Example: M(3) {{1, -2, 0}, {2, 1, -2}, {0, 2, 1}}.at n=48A136643