Number of compositions of n with equal circular differences up to sign.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =6a(5) =10a(6) =8a(7) =16a(8) =13a(9) =16a(10) =18a(11) =32a(12) =20a(13) =30a(14) =30a(15) =57a(16) =34a(17) =52a(18) =46a(19) =96a(20) =74a(21) =86a(22) =84a(23) =174a(24) =119a(25) =170a(26) =192a(27) =306a(28) =244a(29) =332