10223616
domain: N
Appears in sequences
- 20-almost primes (generalization of semiprimes).at n=21A069281
- Hankel transform of sequence (b(n)) where b(n) = Sum_{i=0..n} binomial(2*i,i).at n=19A098106
- Row sums of A128134.at n=19A128135
- Number of parts in all palindromic compositions of n.at n=38A239632
- Number of 4-cycles in the n-Sierpinski tetrahedron graph.at n=10A292542
- a(n) is the least positive integer such that 2^n + a(n)*n*(n+1) equals a power of 2.at n=19A350329
- Triangle read by rows: T(n,d) is the number of fixed, properly d-dimensional polysticks of size n.at n=26A385582