243000

Appears in sequences

• Numbers of form 3^i*10^j, with i, j >= 0.at n=39A025616
• For n>3: a(n) is a multiple of three distinct earlier terms.at n=30A060301
• Number of double tangents of order n.at n=27A060784
• a(n) = 27*(n-1)*(n-2)*(n-3)*(3*n-8)/2.at n=9A064197
• G.f. A(x) satisfies: A(x) = 1/(1-2*x) + x^2*A(x)^2.at n=13A086622
• Smallest order for which there are n nonisomorphic finite Hamiltonian groups, or 0 if no such order exists.at n=22A104453
• Number of 3-turn bishop's tours on an n X n board summed over all starting positions.at n=19A188778
• a(n) = 9*n^3.at n=30A244728
• LB numbers: positive integers of the form m = a*10^k+b (with a > 0 and b < 10^k) satisfying two properties: 1) the set of prime factors of m is the union of the sets of prime factors of a and b; and 2) A001222(m) = A001222(a) + A001222(b).at n=21A267856
• a(n) = 3*(n - 1)^2*n^3.at n=10A300846
• Numbers such that the list of exponents of their factorization is a palindromic list of primes.at n=34A322525
• a(n) = Product_{d|n} A276086(d)^A001221(n/d).at n=27A329380
• a(n) = (27^n - 9^n)/2 - 12^n + 6^n.at n=4A342234
• Cubefull numbers with more than 2 distinct prime factors.at n=10A391755