1140624

Appears in sequences

• Restricted combinations.at n=28A006500
• a(n) = Fibonacci(n)^2 * Fibonacci(n+1).at n=11A066258
• Cyclops squares: squares (A000290) that are also cyclops numbers (A134808).at n=19A160711
• One quarter the number of n X 4 1..4 arrays with no two neighbors of any element equal to each other.at n=9A183356
• Number of n X 2 0..2 arrays with rows, antidiagonals and columns unimodal.at n=10A223719
• Numbers k such that phi(k)^phi(k) == 1 (mod sigma(k)).at n=22A248861
• a(n) = (A262024(n)-1)/2: a(n)*(a(n) + 1) = d(n)*Y(n)^2 with d(n) = A007969 and Y(n) = A261250(n).at n=43A262025
• Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 1,-2 or 2,-1.at n=9A264122
• Powers (A001597) that are also cyclops numbers (A134808).at n=19A285845
• The number of edges inside a hexagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.at n=10A330845