a(n) is the last number in the (2n+1)-element alternating sequence of x/2 and (3x+1) iterations starting with A277215(n).
A277874
a(n) is the last number in the (2n+1)-element alternating sequence of x/2 and (3x+1) iterations starting with A277215(n).
Terms
- a(0) =0a(1) =40a(2) =16a(3) =52a(4) =160a(5) =9232a(6) =18952a(7) =4372a(8) =13120a(9) =39364a(10) =118096a(11) =2480056a(12) =5314408a(13) =35075104a(14) =9565936a(15) =28697812a(16) =86093440a(17) =1807962280a(18) =8523250756a(19) =2324522932a(20) =6973568800a(21) =20920706404a(22) =62762119216a(23) =188286357652a(24) =564859072960
External references
- oeis: A277874