A028440 Golc sequence in base 10. Left to right concatenation of n,int(log_10(n)),int(log_10(int(log_10(n)))),... in base 10.

10, 20, 30, 40, 50, 60, 70, 80, 90, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 201, 211, 221, 231, 241, 251, 261, 271, 281, 291, 301, 311, 321, 331, 341, 351, 361, 371, 381, 391, 401, 411, 421, 431, 441, 451, 461, 471, 481, 491, 501, 511, 521, 531