Numbers n such that string 7,2 occurs in the base 9 representation of n but not of n-1.

Terms

a(0) =65a(1) =146a(2) =227a(3) =308a(4) =389a(5) =470a(6) =551a(7) =585a(8) =632a(9) =713a(10) =794a(11) =875a(12) =956a(13) =1037a(14) =1118a(15) =1199a(16) =1280a(17) =1314a(18) =1361a(19) =1442a(20) =1523a(21) =1604a(22) =1685a(23) =1766a(24) =1847a(25) =1928a(26) =2009a(27) =2043a(28) =2090a(29) =2171