Main diagonal of triangle A132289: a(n) = A132289(n,n) for n>=0.

A132290

Main diagonal of triangle A132289: a(n) = A132289(n,n) for n>=0.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =25a(4) =129a(5) =771a(6) =5172a(7) =38280a(8) =308987a(9) =2695586a(10) =25231269a(11) =251869681a(12) =2667876382a(13) =29856632341a(14) =351717286357

External references