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

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =8a(5) =11a(6) =14a(7) =18a(8) =25a(9) =37a(10) =53a(11) =75a(12) =105a(13) =145a(14) =198a(15) =274a(16) =383a(17) =537a(18) =752a(19) =1053a(20) =1468a(21) =2041a(22) =2838a(23) =3954a(24) =5513a(25) =7693a(26) =10737a(27) =14979a(28) =20880a(29) =29100