Antidiagonal sums of table A125781.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =23a(5) =68a(6) =234a(7) =935a(8) =4313a(9) =22794a(10) =136851a(11) =925272a(12) =6985389a(13) =58417589a(14) =537217862a(15) =5396822876a(16) =58872576894a(17) =693533824034