Position of n-th 0 in A031067.

Terms

a(0) =6a(1) =20a(2) =36a(3) =40a(4) =42a(5) =44a(6) =56a(7) =73a(8) =83a(9) =90a(10) =110a(11) =112a(12) =115a(13) =121a(14) =126a(15) =139a(16) =153a(17) =156a(18) =159a(19) =172a(20) =174a(21) =175a(22) =182a(23) =188a(24) =201a(25) =210a(26) =211a(27) =213a(28) =215a(29) =237