625992

Appears in sequences

• Riordan numbers: a(n) = (n-1)*(2*a(n-1) + 3*a(n-2))/(n+1).at n=17A005043
• Bisection of A005043.at n=8A099252
• First column of A174295.at n=19A174297
• a(n) = [x^n] (1 - 2*x - sqrt((1 - 3*x)/(1 + x)))/(2*x^3).at n=15A342912