1476225
domain: N
Appears in sequences
- Numbers of form 5^i*9^j, with i, j >= 0.at n=36A025624
- Least number with exactly n odd divisors.at n=32A038547
- 3rd binomial transform of (1,2,0,0,0,0,0,0,...).at n=11A081038
- a(n) = n^2*9^n.at n=5A128788
- The least number k such that there are n different representations of k as the difference of two positive triangular numbers.at n=33A136108
- Determinant of the adjacency matrix of the n-cube graph Q_n.at n=5A166734
- Numbers with 33 divisors.at n=12A175743
- Automorphic numbers: n^2 ends with n in base 18 (written in base 10).at n=11A201948
- Number of n X n 0..2 arrays with every element equal to a diagonal or antidiagonal reflection.at n=3A209587
- T(n,k)=Number of n X n 0..k arrays with every element equal to a diagonal or antidiagonal reflection.at n=13A209593
- Number of 4X4 0..n arrays with every element equal to a diagonal or antidiagonal reflection.at n=1A209595
- G.f.: (1+x+x^2+2*x^5-2*x^10)/(1-3*x^3).at n=40A213933
- Smallest odd number with exactly n nonprime divisors.at n=30A287661
- a(n) is the first k such that n = Omega(k) = Omega(k-1) + Omega(k+1), or 0 if there is no such k, where Omega is A001222.at n=11A338302
- a(n) is the least term of A326835 whose number of divisors is n.at n=32A348199