33164

Appears in sequences

• Number of lines through exactly 3 points of an n X n grid of points.at n=33A018810
• Least m such that Phi-Composite-Harmonic series Sum_{k=1..m} 1/A000010(A002808(k)) >= n.at n=15A074470
• a(n) = 1 + n + n*[n/2] + n*[n/2]*[n/3] + n*[n/2]*[n/3]*[n/4] +... where [x]=floor(x).at n=13A075885
• Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k columns of even length (0 <= k < n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.at n=37A121748
• a(n) = number of solutions to the Diophantine equation x+y^2+z^3=n^4 with positive x,y,z all distinct.at n=23A121984
• Column 2 of triangle A128545; a(n) is the coefficient of q^(2n+4) in the central q-binomial coefficient [2n+4,n+2].at n=18A128552
• 1/4 the number of (n+1) X 5 binary arrays with all 2 X 2 subblock sums the same.at n=15A183981
• Coefficient of x^2 in the reduction of the polynomial (x+2)^n by x^3->x^2+x+1.at n=9A192803
• Number of non-equivalent binary n X n matrices with three pairwise nonadjacent 1's.at n=9A232568
• Smallest positive number whose residues modulo the first n primes are all different but whose residues modulo the first n+1 primes are not all different.at n=24A279074
• a(n) = Sum_{k<n} ((2^n-1) mod (2^k-1)).at n=29A329162