519170004

Appears in sequences

• Number of Delannoy paths of length n with no (1,1)-steps on the line y=x.at n=13A109980
• G.f.: ((1+2*x)*sqrt(1-6*x^2+x^4)-1+5*x^2-2*x^3)/(2*x*(1-6*x^2)).at n=26A212205