Antidiagonal sums of array A162997.

Terms

a(0) =1a(1) =3a(2) =9a(3) =29a(4) =100a(5) =369a(6) =1458a(7) =6160a(8) =27740a(9) =132620a(10) =670443a(11) =3571012a(12) =19975955a(13) =117026701a(14) =716199025a(15) =4568532549a(16) =30313253546a(17) =208834580359