Sum of odd entries in row n of Pascal's triangle.

Terms

a(0) =1a(1) =2a(2) =2a(3) =8a(4) =2a(5) =12a(6) =32a(7) =128a(8) =2a(9) =20a(10) =92a(11) =464a(12) =992a(13) =4032a(14) =8192a(15) =32768a(16) =2a(17) =36a(18) =308a(19) =2320a(20) =9692a(21) =52712a(22) =164320a(23) =781312a(24) =1470944a(25) =6249152a(26) =13748672a(27) =56768768a(28) =67100672a(29) =268419072