(Terms in A029665)/2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =8a(6) =1a(7) =1a(8) =18a(9) =1a(10) =1a(11) =32a(12) =70a(13) =98a(14) =1a(15) =102a(16) =168a(17) =1a(18) =50a(19) =270a(20) =357a(21) =1a(22) =627a(23) =1a(24) =72a(25) =253a(26) =605a(27) =1320a(28) =1a(29) =325