69242

Appears in sequences

• Length of hypotenuse squared in right triangle formed by a palindromic spiral plotted in Cartesian coordinates.at n=27A048871
• Number of 0..n arrays of length 6 with each element differing from at least one neighbor by something other than 1, starting with 0.at n=8A221544
• The number of tilings of an equilateral triangle of side length n with k lozenges and n^2 - 2*k unit triangles. Triangle T(n, k) with n >= 1 and 0 <= k <= n*(n + 1)/2, read by rows.at n=20A273464