18588

Appears in sequences

• Row sums up to the main diagonal of the "postage stamp" array (n,m >= 0) defined in A007059.at n=12A039671
• Becomes prime or 4 after exactly 9 iterations of f(x) = sum of prime factors of x.at n=10A048131
• Convolution of A008619 and A001400.at n=34A139672
• The maximum integer dimension in which the volume of the hypersphere of radius n remains larger than 1.at n=32A177677
• Number of nX3 0..7 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero.at n=5A230510
• T(n,k)=Number of nXk 0..7 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero.at n=30A230513
• T(n,k)=Number of nXk 0..7 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero.at n=33A230513
• Initial members of abundant quadruplets, i.e., values of k such that (k, k+2, k+4, k+6) are all abundant numbers.at n=30A231089
• a(n) is the least k such that e(k) = n, where e(k) is the smallest m > 1 such that k^m contains all the digits of k with at least the same multiplicity.at n=10A239465
• Number of (n+1) X (5+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=11A253432
• Number of (5+1) X (n+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=11A253439
• Number of triangles in a Star of David of size n.at n=12A299965
• Number of equivalence classes of convex lattice polygons containing n lattice points, restricting the count to those polygons that are interior to another polygon.at n=46A377245