Number of nonagons that can be formed with perimeter n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =11a(7) =14a(8) =21a(9) =28a(10) =39a(11) =50a(12) =69a(13) =87a(14) =116a(15) =145a(16) =189a(17) =233a(18) =299a(19) =363a(20) =458a(21) =553a(22) =687a(23) =820a(24) =1009a(25) =1195a(26) =1453a(27) =1709a(28) =2058a(29) =2404