Numbers n such that string 5,3 occurs in the base 10 representation of n but not of n-1.

Terms

a(0) =53a(1) =153a(2) =253a(3) =353a(4) =453a(5) =530a(6) =553a(7) =653a(8) =753a(9) =853a(10) =953a(11) =1053a(12) =1153a(13) =1253a(14) =1353a(15) =1453a(16) =1530a(17) =1553a(18) =1653a(19) =1753a(20) =1853a(21) =1953a(22) =2053a(23) =2153a(24) =2253a(25) =2353a(26) =2453a(27) =2530a(28) =2553a(29) =2653