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

Terms

a(0) =1a(1) =6a(2) =10a(3) =28a(4) =36a(5) =88a(6) =104a(7) =240a(8) =272a(9) =608a(10) =672a(11) =1472a(12) =1600a(13) =3456a(14) =3712a(15) =7936a(16) =8448a(17) =17920a(18) =18944a(19) =39936a(20) =41984a(21) =88064a(22) =92160a(23) =192512a(24) =200704a(25) =417792a(26) =434176a(27) =901120a(28) =933888a(29) =1933312