64020

Appears in sequences

• Coordination sequence for 4-dimensional primitive di-isohexagonal orthogonal lattice.at n=22A008530
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 46.at n=10A031724
• Denominators of continued fraction convergents to sqrt(54).at n=11A041093
• a(n) = 8*n^3 + n.at n=20A118465
• a(n) = 121*n^2 + 11.at n=23A158536
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k 3-term arithmetic progressions (n>=0; 0<=k<=floor((n-1)^2/4)).at n=47A162982
• Number of permutations of order n with the length of the longest run equal to 7.at n=4A230130
• Number of orthogonal rectangles with vertices on an n X n square grid of points but with no vertices on the grid's diagonals.at n=25A285956
• Numbers n such that usigma(n) = usigma(2*n+1) where usigma(n) = A034448(n).at n=8A286837
• Number of ordered ways of writing n^2 as a sum of n nonnegative cubes.at n=11A298936
• Number of self-avoiding walks on a 2-dimensional square lattice where the walk consists of steps with incrementing length from 1 to n.at n=10A334877
• Triangle read by rows: T(n,k) is the number of permutations of {1,...,n} whose longest embedded arithmetic progression has length k.at n=61A339941