522256

Appears in sequences

• Surround numbers of an n X 1 rectangle.at n=32A060633
• A triangle sequence of polynomial coefficients: p(x,n)=(-1)^(n + 1)*(x - 1)^(3*n + 1)*Sum[(Binomial[m, n]* Binomial[m + 1, n + 1]/(m - n + 1))*(m + 1)^ n*x^m, {m, 0, Infinity}]/(x^n); t(n,m)=coefficients(p(x,n)).at n=27A155756
• Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant > n.at n=15A211150