a(n) = n*2^(floor(n/2)).

Terms

a(0) =0a(1) =1a(2) =4a(3) =6a(4) =16a(5) =20a(6) =48a(7) =56a(8) =128a(9) =144a(10) =320a(11) =352a(12) =768a(13) =832a(14) =1792a(15) =1920a(16) =4096a(17) =4352a(18) =9216a(19) =9728a(20) =20480a(21) =21504a(22) =45056a(23) =47104a(24) =98304a(25) =102400a(26) =212992a(27) =221184a(28) =458752a(29) =475136