Number of proper linear spaces of order n.

Terms

a(0) =1a(1) =1a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =0a(9) =1a(10) =1a(11) =1a(12) =3a(13) =7a(14) =1a(15) =119a(16) =398a(17) =161925a(18) =2412890