39984

Appears in sequences

• a(n) = (2*n - 5)n^2.at n=28A015240
• Expansion of series related to Liouville's Last Theorem: g.f. sum_{t>0} (-1)^(t+1) *x^(t*(t+1)/2) / ( (1-x^t)^5 *product_{i=1..t} (1-x^i) ).at n=20A059822
• a(1)=1, a(2)=1. a(n) = the sum of the two largest earlier terms which are both coprime to n.at n=64A122457
• a(n) = 64*n^2 - 16.at n=24A157913
• a(n) = 625*n^2 - 2*n.at n=7A158373
• a(n) = coefficient of x^n in the n-th iteration of Sum_{k>=0} x^(2^k), n>=1.at n=6A168362
• Numbers n such that n and n^4 are sums of two twin primes.at n=6A212430
• Number of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w=R, x=R, y=R, z<R, where R = max{w,x,y,z} - min{w,x,y,z}.at n=15A212751
• E.g.f. D(x) = A(x)*B(x)*C(x) where A(x), B(x), and C(x) are the e.g.f.s of A292121, A292122, and A292123, respectively.at n=4A292124
• Expansion of e.g.f. exp(x^3 * exp(-x)).at n=8A292908
• E.g.f.: exp(-x^3 * exp(x)).at n=8A293017
• Numbers k such that k = Product (p_j^e_j) = Product (pi(p_j)*p_j), where pi() = A000720.at n=27A304194
• Least positive integer whose square root starts with at least n odd decimal digits.at n=17A333827
• Least positive integer whose square root starts with at least n odd decimal digits.at n=18A333827
• Least positive integer whose square root starts with at least n odd decimal digits.at n=19A333827
• Least positive integer whose square root starts with just n odd decimal digits.at n=19A334161
• Numbers k such that k*A003557(A003961(k)) divides A353790(k), where A353790(n) = phi(A003973(n)) * A064989(A003973(n)).at n=18A353797
• Numbers k such that A360327(k) = A360327(k+1) > 1.at n=6A360358