83952

Appears in sequences

• Irregular array, read by rows: T(n,k) is the number of labeled acyclic digraphs with n nodes and k arcs (n >= 0, 0 <= k <= n*(n-1)/2).at n=31A081064
• Consider the Kaprekar map n->K(n) defined in A151949. Sequence gives numbers belonging to cycles of length greater than 1.at n=9A099010
• Structured rhombic triacontahedral numbers (vertex structure 11).at n=21A100164
• Number of consistent sets of 5 irreflexive binary order relationships over n objects.at n=2A147821
• Consider the Kaprekar map n->K(n) defined in A151949. Sequence gives numbers belonging to cycles, including fixed points.at n=12A164716
• G.f.: (1 + x/(1 + x^2/(1 + x^3/(1 + x^4/(1 + ...))))) / (1 - x/(1 - x^2/(1 - x^3/(1 - x^4/(1 - ...))))), a continued fraction.at n=22A285636