Number of symmetric 5 X 5 matrices of nonnegative integers with every row and column adding to n.

A053494

Number of symmetric 5 X 5 matrices of nonnegative integers with every row and column adding to n.

Terms

    a(0) =1a(1) =26a(2) =348a(3) =2698a(4) =14751a(5) =62781a(6) =222190a(7) =681460a(8) =1865715a(9) =4655535a(10) =10756921a(11) =23290026a(12) =47700173a(13) =93104473a(14) =174248451a(15) =314246511a(16) =548380980a(17) =929209095a(18) =1533389605a(19) =2470568045a(20) =3894914166a(21) =6019752376a(22) =9136114923a(23) =13635769173a(24) =20039850376a(25) =29033765566

External references