84388

Appears in sequences

• a(n) = n^2*(2*n + 5).at n=34A163683
• a(n) = 73*n^2.at n=34A174334
• Number of tilings of a 5 X n rectangle using n pentominoes of shapes F, L, Y.at n=14A247443
• Number of quadrilaterals in the graph formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).at n=29A332607
• a(n) = Sum_{1 <= i, j, k <= n} gcd(i,j,k).at n=39A344522