Number of compositions of n where the difference between largest and smallest parts equals nine.

Terms

a(0) =0a(1) =0a(2) =2a(3) =3a(4) =12a(5) =23a(6) =61a(7) =135a(8) =306a(9) =679a(10) =1499a(11) =3257a(12) =7050a(13) =15155a(14) =32403a(15) =68958a(16) =146198a(17) =308864a(18) =650526a(19) =1366381a(20) =2862979a(21) =5985534a(22) =12488703a(23) =26009872a(24) =54079483a(25) =112268717a(26) =232738777a(27) =481845900a(28) =996363218a(29) =2057944305