-2089

Appears in sequences

• Expansion of g.f. (x^3+x^2+2*x+1)/(x^4+5*x^2+1).at n=10A101463
• a(n) = -n^2 + 9*n + 53.at n=51A126665
• a(n) = ((n^2+1)^3) - s, where s is the nearest square to (n^2+1)^3.at n=12A233149
• Rectangular array: A(n,k) = Sum_{j=0..k} (-1)^floor(j/2)*binomial(k-floor((j+1)/2), floor(j/2))*(-n)^(k-j), n >= 1, k >= 0, read by antidiagonals.at n=50A299045