934560

Appears in sequences

• Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 23 (most significant digit on right).at n=27A029516
• Expansion of (1-x-x^2)/(1-3x-x^2).at n=12A052991
• a(n) = 3*a(n-2) + a(n-4), a(0)=a(1)=0, a(2)=1, a(3)=2.at n=25A305889
• Triangle read by rows: T(n,k) = number of closed trails of length k starting and ending at a fixed vertex in the complete undirected graph on n labeled vertices, for n >= 1 and k = 0 .. n(n-1)/2.at n=52A357885
• a(n) = Sum_{k=0..n} (1-i)^k * (1+i)^(n-k) * binomial(n+3,k) * binomial(n+3,n-k), where i is the imaginary unit.at n=8A387403