Number of self-avoiding closed walks (from (0,0) to (0,0)) of length 2n in strip {-1, 0, 1} X Z.
A022444
Number of self-avoiding closed walks (from (0,0) to (0,0)) of length 2n in strip {-1, 0, 1} X Z.
Terms
- a(0) =1a(1) =0a(2) =8a(3) =16a(4) =44a(5) =112a(6) =252a(7) =564a(8) =1276a(9) =2840a(10) =6220a(11) =13532a(12) =29292a(13) =63024a(14) =134876a(15) =287428a(16) =610268a(17) =1291336a(18) =2724204a(19) =5731500a(20) =12029260a(21) =25191008a(22) =52646908a(23) =109823636a(24) =228707004a(25) =475533432a(26) =987305612a(27) =2047088764a(28) =4239132716
External references
- oeis: A022444