a(n) = lcm(n, 2^(n-1)).

Terms

a(0) =1a(1) =2a(2) =12a(3) =8a(4) =80a(5) =96a(6) =448a(7) =128a(8) =2304a(9) =2560a(10) =11264a(11) =6144a(12) =53248a(13) =57344a(14) =245760a(15) =32768a(16) =1114112a(17) =1179648a(18) =4980736a(19) =2621440a(20) =22020096a(21) =23068672a(22) =96468992a(23) =25165824a(24) =419430400a(25) =436207616a(26) =1811939328