Array T(n,m) = (2^(n*m)-1)/(2^m-1) read by antidiagonals, n,m>=1.

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =5a(5) =7a(6) =1a(7) =9a(8) =21a(9) =15a(10) =1a(11) =17a(12) =73a(13) =85a(14) =31a(15) =1a(16) =33a(17) =273a(18) =585a(19) =341a(20) =63a(21) =1a(22) =65a(23) =1057a(24) =4369a(25) =4681a(26) =1365a(27) =127a(28) =1a(29) =129