74256

Appears in sequences

• From the enumeration of corners.at n=6A006333
• Number of points on surface of 4-dimensional cube.at n=21A008511
• Theta series of lattice Kappa_10.at n=9A015232
• Products of successive Fibonacci numbers.at n=45A034722
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= n/3.at n=24A047200
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= (n-1)/3.at n=24A048012
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= (n+1)/3.at n=24A048045
• Golden rectangular box numbers: a(n) = n*A007067(n)*A007067(A007067(n)).at n=26A050510
• Number of orbits of length n under the full 13-shift (whose periodic points are counted by A001022).at n=4A060216
• a(n) is the least positive integer k such that k is a repdigit number in exactly n different bases B, where 1<B<k.at n=39A066460
• Group the prime numbers so that the sum of the terms of the n-th group is a multiple of that of the (n-1)-st group: (2), (3,5), (7,11,13,17), (19,23,29,31,37...,79,83), ...; a(n) = sum of n-th group.at n=4A079802
• Largest x such that 1/x + 1/y + 1/z = 1/n.at n=15A082986
• Triangle read by rows: T(n,k) is number of paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(1,1), d=(1,-2) and have k peaks (i.e., ud's).at n=42A108767
• Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k middle edges (n >= 0, k >= 0).at n=38A120986
• Array T(n, k) = (-1)^(n+k)*(n+k-2)!*(2*n+2*k-2)!/(n!*k!*(2*n-1)!*(2*k-1)!), with T(0, 0) = 1, T(0, 1) = T(1, 0) = -1, read by antidiagonals.at n=59A132339
• Array T(n, k) = (-1)^(n+k)*(n+k-2)!*(2*n+2*k-2)!/(n!*k!*(2*n-1)!*(2*k-1)!), with T(0, 0) = 1, T(0, 1) = T(1, 0) = -1, read by antidiagonals.at n=61A132339
• a(n) = ((prime(n))^5-prime(n))/5.at n=5A138426
• a(1) = 1, a(2*n) = a(n)^2, a(2*n+1) = a(n)*(a(n)+1).at n=50A139145
• a(n) = (3n + 2)*binomial(3n + 1,n).at n=5A144485
• Alexandrian integers: numbers of the form n = p*q*r such that 1/n = 1/p - 1/q - 1/r for some integers p,q,r.at n=36A147811