Sixth convolution of Schroeder's (second problem) numbers A001003(n), n>=0.

A111994

Sixth convolution of Schroeder's (second problem) numbers A001003(n), n>=0.

Terms

    a(0) =1a(1) =6a(2) =33a(3) =176a(4) =930a(5) =4908a(6) =25954a(7) =137712a(8) =733539a(9) =3922834a(10) =21060099a(11) =113481504a(12) =613619332a(13) =3328768344a(14) =18112655748a(15) =98833261600a(16) =540705999621

External references