Triangle t(n,m)=A039757(n,m)+A039757(n,n-m) read by rows.

Terms

a(0) =2a(1) =0a(2) =0a(3) =4a(4) =-8a(5) =4a(6) =-14a(7) =14a(8) =14a(9) =-14a(10) =106a(11) =-192a(12) =172a(13) =-192a(14) =106a(15) =-944a(16) =1664a(17) =-720a(18) =-720a(19) =1664a(20) =-944a(21) =10396a(22) =-19560a(23) =12644a(24) =-6960a(25) =12644a(26) =-19560a(27) =10396a(28) =-135134a(29) =264158