3019898880

Appears in sequences

• a(n) = phi(a(n-1)) * number of divisors of a(n-1), a(1)=3.at n=13A063506
• Expansion of (1 - 2x + 2x^2 - x^3)/(1 - 2x)^2.at n=28A084860
• Smallest number beginning with 3 and having exactly n prime divisors counted with multiplicity.at n=28A106423
• a(0) = 9, a(n) = 2*a(n-1) + 2^(n-1) for n > 0.at n=27A159697
• Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 1 local maximum.at n=13A159721
• Order of the general symplectic group of 4 X 4 matrices over Z_n.at n=7A294705