Schroeder triangle sums: a(2*n-1) = A010683(2*n-2) and a(2*n) = A010683(2*n-1) - A001003(2*n-1).

A227506

Schroeder triangle sums: a(2*n-1) = A010683(2*n-2) and a(2*n) = A010683(2*n-1) - A001003(2*n-1).

Terms

    a(0) =1a(1) =1a(2) =7a(3) =17a(4) =121a(5) =353a(6) =2591a(7) =8257a(8) =61921a(9) =207905a(10) =1582791a(11) =5501073a(12) =42344121a(13) =150827073a(14) =1170747519a(15) =4247388417a(16) =33186295681a(17) =122125206977a(18) =959260792775

External references