Dziemianczuk's array S(i,j) read by antidiagonals.

Terms

a(0) =1a(1) =3a(2) =6a(3) =15a(4) =33a(5) =60a(6) =81a(7) =189a(8) =378a(9) =675a(10) =459a(11) =1107a(12) =2349a(13) =4509a(14) =7992a(15) =2673a(16) =6588a(17) =14553a(18) =29403a(19) =55188a(20) =97416a(21) =15849a(22) =39663a(23) =90207a(24) =189351a(25) =371358a(26) =687258a(27) =1209951a(28) =95175a(29) =240894