154088domain: NAppears in sequencesThird diagonal sequence of triangle A115127.at n=8A115134Number of 2 X 2 matrices having entries in {0,1,...,n} and determinant in the closed interval [-n,n] with no entry repeated.at n=37A279063a(n) = Sum_{k=1..n} (k^2*floor(k/2)).at n=32A285188