Number of strings of numbers x(i=1..n) in 0..6 with sum i^2*x(i) equal to n^2*6.

A183950

Number of strings of numbers x(i=1..n) in 0..6 with sum i^2*x(i) equal to n^2*6.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =21a(4) =94a(5) =398a(6) =1613a(7) =6301a(8) =23611a(9) =85595a(10) =299789a(11) =1018889a(12) =3364983a(13) =10823939a(14) =33973701a(15) =104224215a(16) =313017236a(17) =921527638a(18) =2662917595a(19) =7561290034a(20) =21119173722a(21) =58077373552a(22) =157382658382a(23) =420599245799

External references