Row sums of A349728.

Terms

a(0) =1a(1) =1a(2) =4a(3) =16a(4) =66a(5) =284a(6) =1296a(7) =6432a(8) =35862a(9) =231652a(10) =1760232a(11) =15629648a(12) =158866436a(13) =1807908216a(14) =22636353856a(15) =308050239360