-57571740

Appears in sequences

• Expansion of (1+4x-sqrt(1+4x^2))/(4+6x) in powers of x.at n=37A086990
• A Chebyshev transform of 2^n.at n=36A090412
• Expansion of 1/(1+3*x*c(x)), c(x) the g.f. of Catalan numbers A000108.at n=18A126982