Position of n-th 0 in A031007.

Terms

a(0) =0a(1) =7a(2) =21a(3) =35a(4) =49a(5) =63a(6) =77a(7) =91a(8) =92a(9) =95a(10) =98a(11) =101a(12) =104a(13) =107a(14) =110a(15) =112a(16) =133a(17) =154a(18) =175a(19) =196a(20) =217a(21) =238a(22) =239a(23) =242a(24) =245a(25) =248a(26) =251a(27) =254a(28) =257a(29) =259