Triangle t(n, m) = 2*binomial(n,m)^2 -A008292(n+1,m+1)^2 read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-8a(5) =1a(6) =1a(7) =-103a(8) =-103a(9) =1a(10) =1a(11) =-644a(12) =-4284a(13) =-644a(14) =1a(15) =1a(16) =-3199a(17) =-91004a(18) =-91004a(19) =-3199a(20) =1a(21) =1a(22) =-14328a(23) =-1418031a(24) =-5836256a(25) =-1418031a(26) =-14328a(27) =1a(28) =1a(29) =-60911