Triangle T(n,k), read by rows: T(n,k) is the numerator of (1+2^(n-k+1))/(1-2^(k+1)).

Terms

a(0) =-3a(1) =-5a(2) =-1a(3) =-9a(4) =-5a(5) =-3a(6) =-17a(7) =-3a(8) =-5a(9) =-1a(10) =-33a(11) =-17a(12) =-9a(13) =-1a(14) =-3a(15) =-65a(16) =-11a(17) =-17a(18) =-3a(19) =-5a(20) =-1a(21) =-129a(22) =-65a(23) =-33a(24) =-17a(25) =-9a(26) =-5a(27) =-3a(28) =-257a(29) =-43