Square array read by descending antidiagonals: T(n,k) = ((2^(n+1) + 1)^(k-1) + 1)/2.

Terms

a(0) =1a(1) =3a(2) =1a(3) =13a(4) =5a(5) =1a(6) =63a(7) =41a(8) =9a(9) =1a(10) =313a(11) =365a(12) =145a(13) =17a(14) =1a(15) =1563a(16) =3281a(17) =2457a(18) =545a(19) =33a(20) =1a(21) =7813a(22) =29525a(23) =41761a(24) =17969a(25) =2113a(26) =65a(27) =1a(28) =39063a(29) =265721