a(n) = greatest k such that s(j) > 0 for all j < k at end of stage n in forming A026400.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =7a(5) =10a(6) =14a(7) =15a(8) =20a(9) =23a(10) =28a(11) =29a(12) =36a(13) =44a(14) =48a(15) =49a(16) =58a(17) =63a(18) =73a(19) =75a(20) =86a(21) =98a(22) =99a(23) =109a(24) =116a(25) =127a(26) =129a(27) =132a(28) =156a(29) =175