34663

Appears in sequences

• a(1) = 4; a(n) is smallest semiprime > 3*a(n-1).at n=8A117916
• Irregular array read by rows in which row n lists the positive integers k in ascending order for which 1 is in a primitive cycle of n positive integers under iteration by the Collatz-like 3x+k function.at n=46A226618