Antidiagonal sums of square array A111910.

Terms

a(0) =1a(1) =2a(2) =7a(3) =30a(4) =146a(5) =772a(6) =4331a(7) =25398a(8) =154158a(9) =961820a(10) =6137734a(11) =39909740a(12) =263665252a(13) =1765815560a(14) =11966535091a(15) =81937361702a(16) =566185489878