34048

Appears in sequences

• Numbers k such that the number of steps to reach 1 in '3x+1' problem equals tau(k), the number of divisors of k.at n=38A070980
• Binomial transform of generalized Lucas numbers S(n) = S(n-1) + S(n-2) + S(n-3), S(0)=3, S(1)=1, S(2)=3.at n=10A073313
• Maximum of the absolute values of the coefficients of P(n,x) where P(n,x) = 4^(n-1)*Product_{k=0..n} (x - cos(k*Pi/n)^2).at n=6A076625
• Totally multiplicative sequence with a(p) = 9p+1 for prime p.at n=41A166667
• Numbers of the form p^8*q*r where p, q, and r are distinct primes.at n=21A179747
• Monotonic ordering of set S generated by these rules: if x and y are in S then x^2+y^2-xy is in S, and 2 is in S.at n=29A192533
• Numbers that are the product of exactly 10 primes and are of the form prime(n) + prime(n + 1).at n=15A281927
• G.f. satisfies A(x) = 1 + 2*x + 2*x^2*A(x)^2.at n=11A367071