a(n) = n*2^floor((n+1)/2).

Terms

a(0) =0a(1) =2a(2) =4a(3) =12a(4) =16a(5) =40a(6) =48a(7) =112a(8) =128a(9) =288a(10) =320a(11) =704a(12) =768a(13) =1664a(14) =1792a(15) =3840a(16) =4096a(17) =8704a(18) =9216a(19) =19456a(20) =20480a(21) =43008a(22) =45056a(23) =94208a(24) =98304a(25) =204800a(26) =212992a(27) =442368a(28) =458752a(29) =950272