Number of ordered ways of writing n-th triangular number as a sum of n squares of positive integers.

A299032

Number of ordered ways of writing n-th triangular number as a sum of n squares of positive integers.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =3a(4) =6a(5) =0a(6) =12a(7) =106a(8) =420a(9) =2718a(10) =18240a(11) =120879a(12) =694320a(13) =5430438a(14) =40668264a(15) =300401818a(16) =2369504386a(17) =19928714475a(18) =174151735920

External references