Antidiagonal sums of table A083087.

Terms

a(0) =1a(1) =5a(2) =17a(3) =49a(4) =128a(5) =321a(6) =790a(7) =1924a(8) =4664a(9) =11282a(10) =27262a(11) =65843a(12) =158988a(13) =383863a(14) =926761a(15) =2237435a(16) =5401685a(17) =13040863a(18) =31483472a(19) =76007871a(20) =183499282a(21) =443006506a(22) =1069512368a(23) =2582031320a(24) =6233575089a(25) =15049181582a(26) =36331938341a(27) =87713058356