Product of the even divisors of 2n.

Terms

a(0) =2a(1) =8a(2) =12a(3) =64a(4) =20a(5) =576a(6) =28a(7) =1024a(8) =216a(9) =1600a(10) =44a(11) =110592a(12) =52a(13) =3136a(14) =3600a(15) =32768a(16) =68a(17) =373248a(18) =76a(19) =512000a(20) =7056a(21) =7744a(22) =92a(23) =84934656a(24) =1000a(25) =10816a(26) =11664a(27) =1404928a(28) =116a(29) =207360000