49689

Appears in sequences

• Number of points in Z^4 of norm <= n.at n=10A055410
• Number of points in Z^n of norm <= 10.at n=4A055434
• a(n) = Sum_{k=1..n} A060999(k) * k^3.at n=7A061000
• Least positive integer multiples of angle x such that their direction cosines form a unit vector: Sum_{k>0} cos(a(k)*x)^2 = 1, where a(1)=1 and x=1.at n=17A080136
• Numbers n such that 9*10^n + 8*R_n - 5 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=9A103108
• a(n) = numerator of the coefficient c(n) of x^n in sqrt(1+x)/Product_{k=1..n-1} 1 + c(k)*x^k, n = 1, 2, 3, ...at n=20A170922
• a(n) = numerator of the coefficient c(n) of x^n in (1/sqrt(1-x))/Product_{k=1..n-1} 1 + c(k)*x^k, n = 1, 2, 3, ...at n=20A170924
• Number of lattice points inside or on the 4-dimensional hypersphere x^2 + y^2 + z^2 + u^2 = 10^n.at n=2A373882
• Positive numbers k such that (sin k)^k sets a new record.at n=7A383540