Size of acyclic domain of size n based on the alternating scheme.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =20a(5) =45a(6) =100a(7) =222a(8) =488a(9) =1069a(10) =2324a(11) =5034a(12) =10840a(13) =23266a(14) =49704a(15) =105884a(16) =224720a(17) =475773a(18) =1004212a(19) =2115186a(20) =4443896a(21) =9319702a(22) =19503224a(23) =40750884a(24) =84990640a(25) =177017810a(26) =368108680a(27) =764571492a(28) =1585851248a(29) =3285861924