43970

Appears in sequences

• One sixth of the unitary sociable numbers.at n=5A097323
• Numbers k that divide the sum of digits of 13^k.at n=55A175525
• a(n) = (x(n)^2 + 1)/m(n), with m(n) = A002559(n) (Markoff numbers) and x(n)= A324601(n), for n >= 3. The Markoff uniqueness conjecture is assumed to be true.at n=37A309161
• The 100 terms of the cycle that A321021 goes into.at n=59A321022