11662902

Appears in sequences

• Generalized ballot numbers (first differences of Motzkin numbers).at n=18A002026
• Expansion of (1-x)*c(x/(1+x)), where c(x) is the g.f. of the Catalan numbers (A000108).at n=20A105695
• Expansion of (-2 +x^2 +x -x*sqrt(1-2*x-3*x^2))/(-1 +x -sqrt(1-2*x-3*x^2)).at n=19A244884