Triangle read by rows: T(n,m) = C(n+m+1,n)*C(2*n-m,n)*C(3*n+1,n)*C(4*n+2,2*m+1)/(2*(n+1)*C(2*n,n)*C(2*n+2*m+2,2*n)).

A338415

Triangle read by rows: T(n,m) = C(n+m+1,n)*C(2*n-m,n)*C(3*n+1,n)*C(4*n+2,2*m+1)/(2*(n+1)*C(2*n,n)*C(2*n+2*m+2,2*n)).

Terms

    a(0) =1a(1) =2a(2) =2a(3) =7a(4) =18a(5) =7a(6) =30a(7) =130a(8) =130a(9) =30a(10) =143a(11) =884a(12) =1530a(13) =884a(14) =143a(15) =728a(16) =5880a(17) =14896a(18) =14896a(19) =5880a(20) =728a(21) =3876a(22) =38760a(23) =131100a(24) =193200a(25) =131100a(26) =38760a(27) =3876a(28) =21318a(29) =254562

External references