105098

Appears in sequences

• a(n) = [ a(n-1)/a(1) + a(n-2)/a(2) + ... + a(1)/a(n-1) ], for n >= 3.at n=21A022857
• Record sum of numbers in trajectory of 3x+1 problem.at n=10A033494
• Numbers n such that 155*2^n-1 is prime.at n=23A050619
• Number of n-node rooted trees whose node-height is less than their number of leaves.at n=15A358728