Number of subsets of {1,2,3,...,n} that sum to 0 mod 17.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =8a(8) =15a(9) =30a(10) =60a(11) =120a(12) =241a(13) =482a(14) =964a(15) =1928a(16) =3856a(17) =7712a(18) =15422a(19) =30842a(20) =61682a(21) =123362a(22) =246722a(23) =493446a(24) =986896a(25) =1973790a(26) =3947580a(27) =7895160a(28) =15790320a(29) =31580642