Row sums of A293472.

Terms

a(0) =1a(1) =2a(2) =5a(3) =13a(4) =37a(5) =106a(6) =331a(7) =981a(8) =3473a(9) =9010a(10) =49481a(11) =-7435a(12) =1744909a(13) =-13392950a(14) =186659383a(15) =-2369054219a(16) =33839782689a(17) =-510323573086