Table T(m,n) = (3^m + 5^n)/2, for m, n = 0, 2, 4, 6, ... read by antidiagonals downwards.

Terms

a(0) =1a(1) =13a(2) =5a(3) =313a(4) =17a(5) =41a(6) =7813a(7) =317a(8) =53a(9) =365a(10) =195313a(11) =7817a(12) =353a(13) =377a(14) =3281a(15) =4882813a(16) =195317a(17) =7853a(18) =677a(19) =3293a(20) =29525a(21) =122070313a(22) =4882817a(23) =195353a(24) =8177a(25) =3593a(26) =29537a(27) =265721a(28) =3051757813a(29) =122070317