69368

Appears in sequences

• Representation degeneracies for Ramond strings.at n=25A005303
• Non-palindromic solutions to sigma(R(n)) = sigma(n), where R = A004086 is digit-reversal.at n=28A085329
• Triangular sequence: f(n) = Product[Prime[a]*k + Prime[b], {k,0,n}]; a = 2; b = 1; t(n,m) = Numerator[f(n)/(f(n-m)*f(m))].at n=60A154096
• Table read by rows: T(n,k) = number of k-gons, k >= 3, formed inside a square with edge length 1 by the straight line segments mutually connecting all vertices and points that divide the sides into segments with lengths equal to the Farey series of order n = A006842(n,m)/A006843(n,m), m = 1..A005728(n).at n=23A358889