60716

Appears in sequences

• Indices of primes in sequence defined by A(0) = 21, A(n) = 10*A(n-1) + 71 for n > 0.at n=13A101969
• Number of steps to reach 1 in '3x+1' (or Collatz) problem starting with the n-th Mersenne prime.at n=19A181777
• Number of strings of numbers x(i=1..n) in 0..4 with Sum_{i=1..n} i^2*x(i)^3 = n^2*64.at n=13A184313
• Difference between sum of all even and the sum of all odd numbers in Collatz (3x+1) trajectory of n.at n=30A213917