26500

Appears in sequences

• Numbers that are the sum of 5 nonzero 8th powers.at n=19A003383
• Denominators of continued fraction convergents to sqrt(356).at n=13A041675
• Number of cyclic graphs with oriented edges on n nodes (up to symmetry of dihedral group).at n=19A053656
• Pseudo-random numbers: MS C 6.0 version.at n=3A084275
• Triangle read by rows: T[n,k] = number of n X n binary matrices with k=0...n^2 ones, distinct up to cyclic shifts of rows and columns; reflection through any vertical or horizontal axis; and reflection through the main diagonal. Also, quasi-n-ominoes on a torus divided into a k X k grid.at n=46A093466
• Triangle read by rows: T[n,k] = number of n X n binary matrices with k=0...n^2 ones, distinct up to cyclic shifts of rows and columns; reflection through any vertical or horizontal axis; and reflection through the main diagonal. Also, quasi-n-ominoes on a torus divided into a k X k grid.at n=47A093466
• The common value of sigma_2 for square-amicable numbers, sigma_2(m)=sigma_2(n), m<n.at n=12A110929
• a(n) = n*(n+1)*(11*n+1)/6.at n=24A132112
• Numbers k such that k and k^2 use only the digits 0, 2, 5, 6 and 7.at n=62A136912
• a(n) = (sum of first n primes) * n.at n=24A167214
• a(n) = n^3*(5*n+3)/2.at n=10A229146
• Number of ascending runs in {1,...,10}^n.at n=4A229284
• One half of the even entries of A033317.at n=52A261250
• Least positive integer n having only the digits 0 or 1 in base 3, such that the product with A263488(n) also has only digits 0 or 1 in base 3.at n=80A265143
• Number of series-reduced free pure achiral multifunctions with one atom and n positions.at n=30A317885
• Table read by antidiagonals: T(n,k) is the number of tilings of the n X k torus up to 180-degree rotation by a tile that is not fixed under 180-degree rotation.at n=31A368308
• Table read by antidiagonals: T(n,k) is the number of tilings of the n X k torus up to 180-degree rotation by a tile that is not fixed under 180-degree rotation.at n=32A368308