Numbers k such that string 5,3 occurs in the base 7 representation of k but not of k-1.

Terms

a(0) =38a(1) =87a(2) =136a(3) =185a(4) =234a(5) =266a(6) =283a(7) =332a(8) =381a(9) =430a(10) =479a(11) =528a(12) =577a(13) =609a(14) =626a(15) =675a(16) =724a(17) =773a(18) =822a(19) =871a(20) =920a(21) =952a(22) =969a(23) =1018a(24) =1067a(25) =1116a(26) =1165a(27) =1214a(28) =1263a(29) =1295