Number of weak snarks on 2n nodes.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =0a(8) =2a(9) =6a(10) =31a(11) =155a(12) =1297a(13) =12517a(14) =139854a(15) =1764950a(16) =25286953a(17) =404899916