a(n) is the number of subsets of {1..n} that contain exactly 5 odd numbers.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =16a(9) =32a(10) =192a(11) =384a(12) =1344a(13) =2688a(14) =7168a(15) =14336a(16) =32256a(17) =64512a(18) =129024a(19) =258048a(20) =473088a(21) =946176a(22) =1622016a(23) =3244032a(24) =5271552a(25) =10543104a(26) =16400384a(27) =32800768a(28) =49201152a(29) =98402304