Smallest number k such that gcd(s1, s2) = n, where s1 is the sum of the odd numbers and s2 is the sum of the even numbers in the Collatz (3x+1) trajectory of k.

A271973

Smallest number k such that gcd(s1, s2) = n, where s1 is the sum of the odd numbers and s2 is the sum of the even numbers in the Collatz (3x+1) trajectory of k.

Terms

    a(0) =1a(1) =10a(2) =9a(3) =30a(4) =65a(5) =5a(6) =74a(7) =86a(8) =368a(9) =135a(10) =970a(11) =50a(12) =95a(13) =101a(14) =1045a(15) =178a(16) =793a(17) =7a(18) =214a(19) =196a(20) =18a(21) =423a(22) =133a(23) =200a(24) =2572a(25) =629a(26) =621a(27) =358a(28) =700a(29) =451

External references