Number of 5 X 5 0..n symmetric arrays with all rows summing to floor(n*5/2).

A213803

Number of 5 X 5 0..n symmetric arrays with all rows summing to floor(n*5/2).

Terms

    a(0) =112a(1) =5673a(2) =87932a(3) =815263a(4) =4843626a(5) =22698959a(6) =84662388a(7) =275879169a(8) =782758404a(9) =2036181209a(10) =4827542558a(11) =10773876919a(12) =22498928491a(13) =44939366943a(14) =85390966217a(15) =156814686053a(16) =276999175867a(17) =476278194021a(18) =793826178700

External references