The number of subsets X of Zn such that for all u, v in X, u+v is not in X.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =14a(6) =16a(7) =30a(8) =38a(9) =70a(10) =81a(11) =150a(12) =164a(13) =317a(14) =365a(15) =651a(16) =693a(17) =1376a(18) =1357a(19) =2728a(20) =2647a(21) =5458a(22) =5094a(23) =10645a(24) =10098a(25) =20657a(26) =18208a(27) =39071a(28) =33615a(29) =79672