Number of subsets of {1..n} containing n such that every subset has a different sum.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =9a(5) =14a(6) =20a(7) =35a(8) =44a(9) =76a(10) =96a(11) =139a(12) =179a(13) =257a(14) =312a(15) =483a(16) =561a(17) =793a(18) =970a(19) =1459a(20) =1535a(21) =2307a(22) =2619a(23) =3503a(24) =4130a(25) =5478a(26) =5973a(27) =8165a(28) =9081a(29) =11666