27500

Appears in sequences

• Expansion of (1-25*x)^(-1/5), related to quintic factorial numbers A008548.at n=4A034688
• Numbers k that can be expressed as k = w + x = y*z with w*x = y^3 + z^3 where w, x, y, and z are all positive integers.at n=37A057372
• Variation of Boustrophedon transform applied to 1,1,1,1,... Fill an array by diagonals, all in the 'up' direction. The first column is 1,1,1,1,.... For the next element of a diagonal, add to the previous element the elements of the row and the column the new element is in. The first row gives a(n).at n=7A059578
• The array of A059578 read by antidiagonals in the 'up' direction.at n=35A059579
• Denominators used to compute the column sequences of triangle A090217.at n=3A090436
• a(1) = 2, a(n) = a(n-1) + 3*(a(n-1)-floor(a(n-1)^(1/3))^3).at n=25A096295
• Triangle read by rows: T(n,k) is the number of Delannoy paths of length n, having k EE's and NN's crossing the line y = x (i.e., two consecutive E steps from the line y = x+1 to the line y = x-1 or two consecutive N steps from the line y = x-1 to the line y = x+1).at n=41A110123
• a(n) = binomial(n+9, 9)*5^n.at n=3A140520
• a(n) = binomial(n+2,3)*5^3.at n=9A141480
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, -1, 1), (0, 0, 1), (0, 1, 0), (1, 1, -1)}.at n=8A150213
• Constant term in the reduction by (x^2 -> x+1) of the polynomial C(n)*x^n, where C=A022095.at n=11A192916
• Number of (w,x,y,z) with all terms in {1,...,n} and 2|w-x|>n+|y-z|.at n=22A212689
• Square array read by downward antidiagonals: super Patalan numbers of order 5.at n=10A248326
• a(n) = 5*(n+1)*(9*n+4).at n=24A304507
• Number of subsets of {1..n} whose sum is a decimal palindrome.at n=18A339507
• Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(k^3).at n=19A343323
• Numbers m such that the smallest digit in the decimal expansion of 1/m is 3, ignoring leading and trailing 0's.at n=26A352157
• Pointwise product of the arithmetic derivative and the primorial base exp-function.at n=24A358669
• The least common multiple of the arithmetic derivative and the primorial base exp-function.at n=24A359423
• Irregular triangle read by rows: T(n,k) (0 <= k <= n^2) are coefficients of cluster density function for site percolation on an n X n 2D nnsquare lattice with periodic boundary conditions.at n=38A365942