Number of non-alternating anti-run compositions of n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =2a(7) =4a(8) =10a(9) =23a(10) =49a(11) =96a(12) =192a(13) =368a(14) =692a(15) =1299a(16) =2403a(17) =4400a(18) =8029a(19) =14556a(20) =26253a(21) =47206a(22) =84574a(23) =151066a(24) =269244a(25) =478826a(26) =849921a(27) =1506309a(28) =2665829a(29) =4711971