Numerator of the sum of all matrix elements of n X n matrix M[i,j]=CatalanNumber[i]/CatalanNumber[j], where CatalanNumber[k]=(2k)!/k!/(k+1)!=A000108[k].

A120306

Numerator of the sum of all matrix elements of n X n matrix M[i,j]=CatalanNumber[i]/CatalanNumber[j], where CatalanNumber[k]=(2k)!/k!/(k+1)!=A000108[k].

Terms

    a(0) =1a(1) =9a(2) =68a(3) =1364a(4) =12064a(5) =58303a(6) =4517375a(7) =1142991a(8) =4251679307a(9) =138473652271a(10) =240881487689a(11) =857560784067

External references