995328

Appears in sequences

• Dan numbers: numbers m of the form 2^j * 3^k such that m +- 1 are twin primes.at n=13A027856
• Orders of finite Abelian groups having the incrementally largest numbers of nonisomorphic forms (A046054).at n=23A046055
• Duplicate of A027856.at n=13A059961
• Largest n-digit number with only prime divisors 2 or 3 (i.e., of the form 2^a * 3^b).at n=5A069055
• Numbers n such that n=phi(n)*core(n) where phi(x) is the Euler totient function and core(x) the squarefree part of x (the smallest integer such that x*core(x) is a square).at n=39A069185
• 17-almost primes (generalization of semiprimes).at n=13A069278
• Triangular array T(n,k) read by rows, giving number of labeled free trees such that the root is smaller than all its children, with respect to the number n of vertices and to the label k of the root.at n=33A071211
• a(1) = 1, a(n) = a(n-1) times largest divisor of n <= n^(1/2).at n=23A072488
• Expansion of x*(1+3*x+12*x^2)/(1-24*x^3).at n=13A076506
• Expansion of 3*x*(1-x)*(1+2*x+6*x^2)/(1-24*x^3).at n=13A076509
• Expansion of 3*(1+2*x+6 x^2)/(1-24*x^3).at n=12A076510
• Terms of A025487 which are a multiple of their indices.at n=35A077562
• Largest n-digit 7-smooth number. Or largest n-digit number with prime divisors < 10.at n=5A085868
• Smallest number beginning with 9 and having exactly n prime divisors counted with multiplicity.at n=16A106429
• Product_{k=1..n} (A013929(k)), the product of the first n positive integers that are each divisible by at least one square >= 4.at n=5A110901
• Powerful numbers (definition 1) sandwiched between twin primes.at n=28A113839
• n*phi(n)*phi(phi(n)) is a fourth power.at n=11A116003
• a(1)=1; for n>1, a(n) = a(n-1) + lcm(a(n-1),n).at n=11A135504
• Averages of twin prime pairs k such that k*3 and k/3 are squares.at n=22A154671
• a(n) = Product_{k=1..n} b(k,n), where b(k,n) is the largest positive integer that, when written in binary, occurs as a substring in both binary k and binary n.at n=11A175490