Self-convolution of array T given by A026300.

Terms

a(0) =1a(1) =2a(2) =8a(3) =38a(4) =195a(5) =1042a(6) =5710a(7) =31824a(8) =179534a(9) =1022108a(10) =5860360a(11) =33791804a(12) =195753023a(13) =1138357170a(14) =6641444190a(15) =38855909550a(16) =227876590746