Position of n-th 0 in A003137.

Terms

a(0) =4a(1) =10a(2) =16a(3) =17a(4) =19a(5) =22a(6) =26a(7) =35a(8) =43a(9) =44a(10) =46a(11) =49a(12) =53a(13) =62a(14) =70a(15) =71a(16) =72a(17) =74a(18) =75a(19) =78a(20) =79a(21) =82a(22) =84a(23) =86a(24) =90a(25) =94a(26) =96a(27) =98a(28) =102a(29) =107