180222

Appears in sequences

• Numbers that are the sum of 9 positive 10th powers.at n=30A004809
• Expansion of (1+x)^(1/3)/(1+x-18*x^4)^(1/3).at n=18A098537
• a(n) is the smallest even number not congruent to 1 modulo 3 that starts a (2n+1)-element alternating sequence of x/2 and (3x+1) iterations ending in the maximum of its Collatz trajectory.at n=13A277215