a(n) = smallest multiple of n which is >= 2^n.

Terms

a(0) =2a(1) =4a(2) =9a(3) =16a(4) =35a(5) =66a(6) =133a(7) =256a(8) =513a(9) =1030a(10) =2057a(11) =4104a(12) =8203a(13) =16394a(14) =32775a(15) =65536a(16) =131087a(17) =262152a(18) =524305a(19) =1048580a(20) =2097165a(21) =4194322a(22) =8388629a(23) =16777224a(24) =33554450a(25) =67108886a(26) =134217729a(27) =268435468a(28) =536870939a(29) =1073741850