Least odd k such that C(2k, k) == 1 (mod A007775(n)), or 0 if no such k exists.

Terms

a(0) =1a(1) =17a(2) =13a(3) =2383a(4) =37a(5) =3a(6) =3391a(7) =185a(8) =129a(9) =419a(10) =95a(11) =139a(12) =7a(13) =7373a(14) =497a(15) =21a(16) =89a(17) =27a(18) =319a(19) =7a(20) =23a(21) =191a(22) =277a(23) =25a(24) =33635a(25) =137a(26) =1957a(27) =347a(28) =879a(29) =889