Position of n-th 0 in A031312.

Terms

a(0) =97a(1) =100a(2) =103a(3) =106a(4) =109a(5) =247a(6) =250a(7) =253a(8) =256a(9) =259a(10) =397a(11) =400a(12) =403a(13) =406a(14) =409a(15) =547a(16) =550a(17) =553a(18) =556a(19) =559a(20) =697a(21) =700a(22) =703a(23) =706a(24) =709a(25) =847a(26) =850a(27) =853a(28) =856a(29) =859