Number of subsets of {1,2,...,n} such that no two elements differ by 1, 2, 3, or 5.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =7a(6) =9a(7) =12a(8) =16a(9) =22a(10) =29a(11) =39a(12) =52a(13) =70a(14) =93a(15) =125a(16) =167a(17) =224a(18) =299a(19) =401a(20) =536a(21) =718a(22) =960a(23) =1286a(24) =1720a(25) =2303a(26) =3081a(27) =4125a(28) =5519a(29) =7388