Number of subsets of {1,2,3,...,n} that sum to 0 mod 14.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =5a(7) =10a(8) =19a(9) =37a(10) =73a(11) =147a(12) =293a(13) =586a(14) =1172a(15) =2342a(16) =4682a(17) =9362a(18) =18726a(19) =37450a(20) =74900a(21) =149800a(22) =299596a(23) =599188a(24) =1198372a(25) =2396748a(26) =4793492a(27) =9586984a(28) =19173968a(29) =38347928