Number of strings of numbers x(i=1..n) in 0..5 with sum i*x(i)^2 equal to n*25.

A184437

Number of strings of numbers x(i=1..n) in 0..5 with sum i*x(i)^2 equal to n*25.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =14a(4) =39a(5) =238a(6) =915a(7) =3532a(8) =15165a(9) =56094a(10) =202714a(11) =742339a(12) =2571320a(13) =8690976a(14) =28962054a(15) =93717076a(16) =296850271a(17) =923818730a(18) =2815625489a(19) =8428070046a(20) =24812690100a(21) =71831879744a(22) =204732764217a(23) =574966504528

External references