Square array read by antidiagonals. Convolution of a(n) = 2*a(n-1) - a(n-2) and 10^n.

Terms

a(0) =1a(1) =10a(2) =2a(3) =100a(4) =19a(5) =4a(6) =1000a(7) =190a(8) =36a(9) =8a(10) =10000a(11) =1900a(12) =361a(13) =68a(14) =16a(15) =100000a(16) =19000a(17) =3610a(18) =686a(19) =128a(20) =32a(21) =1000000a(22) =190000a(23) =36100a(24) =6859a(25) =1304a(26) =240a(27) =64a(28) =10000000a(29) =1900000