53046

Appears in sequences

• n/2 analog of Keith numbers.at n=8A282766
• Triangle read by rows: T(n,k) is the number of permutations of k elements from [1..n] with longest consecutive chain size less than 3, when 1 and n are considered to be consecutive.at n=51A340107
• E.g.f. satisfies log(A(x)) = (exp(x) - 1)^2 * A(x).at n=7A357009
• Irregular triangle read by rows: T(n,k) is the coefficient of x^k in the domination polynomial of the n X n king graph (n>=1, A075561(n)<=k<=n^2).at n=43A378420