Zeros in Cald's sequence: positions k such that A006509(k) = 0.

Terms

a(0) =117a(1) =199a(2) =381a(3) =427a(4) =521a(5) =721a(6) =1151a(7) =1997a(8) =3625a(9) =6607a(10) =12269a(11) =23209a(12) =41133a(13) =75441a(14) =141209a(15) =266969a(16) =507701a(17) =968373a(18) =1851971a(19) =3549473a(20) =6817481a(21) =13115259a(22) =25267949a(23) =48750929a(24) =94173137a(25) =182122379a(26) =352587759a(27) =683348381a(28) =1325663485a(29) =2419811401