Number of compositions of n whose negation is unimodal.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =7a(5) =13a(6) =21a(7) =36a(8) =57a(9) =91a(10) =140a(11) =217a(12) =323a(13) =485a(14) =711a(15) =1039a(16) =1494a(17) =2144a(18) =3032a(19) =4279a(20) =5970a(21) =8299a(22) =11438a(23) =15708a(24) =21403a(25) =29065a(26) =39218a(27) =52725a(28) =70497a(29) =93941