63842

Appears in sequences

• Coefficient of x^2 in the reduction by (x^3 -> x + 1) of the polynomial F(n+1)*x^n, where F(n)=A000045 (Fibonacci sequence).at n=12A192913
• Number of 0..n arrays of length 3 with 0 never adjacent to n.at n=38A212836
• Irregular triangle read by rows: T(n,k) is the number of unlabeled n-node graphs with intersection number (or edge clique cover number) k; n >= 1, 0 <= k <= floor(n^2/4).at n=65A355754