Meanders of length n and central angle < 360 degrees.

Terms

a(0) =0a(1) =1a(2) =1a(3) =4a(4) =1a(5) =15a(6) =1a(7) =41a(8) =23a(9) =133a(10) =1a(11) =650a(12) =1a(13) =1725a(14) =961a(15) =6930a(16) =1a(17) =30323a(18) =1a(19) =99716a(20) =40431a(21) =352729a(22) =1a(23) =1709125a(24) =35467a(25) =5200315a(26) =2008233a(27) =20960538a(28) =1a(29) =93058849