Number of n-celled one-sided polyplets.

Terms

a(0) =1a(1) =2a(2) =6a(3) =34a(4) =166a(5) =991a(6) =5931a(7) =37196a(8) =235456a(9) =1514618a(10) =9826177a(11) =64284947a(12) =423241426a(13) =2802300793a(14) =18642694440a(15) =124544085550a(16) =835091956750