115546

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 27.at n=19A031615
• Rectangular array read by antidiagonals. T(n,k) is the number of length k walks from {} to [n] in the digraph representation of the superset/subset relation on P([n]) the powerset of [n], n>=0, k>=0.at n=60A336703