Number of n-step self-avoiding walks on diamond.

Terms

a(0) =1a(1) =4a(2) =12a(3) =36a(4) =108a(5) =324a(6) =948a(7) =2796a(8) =8196a(9) =24060a(10) =70188a(11) =205284a(12) =597996a(13) =1744548a(14) =5073900a(15) =14774652a(16) =42922452a(17) =124814484a(18) =362267652a(19) =1052271732a(20) =3051900516a(21) =8857050204a(22) =25671988020a(23) =74449697484a(24) =215677847460a(25) =625096195404