A044137 Numbers n such that string 5,5 occurs in the base 6 representation of n but not of n-1.

35, 71, 107, 143, 179, 210, 251, 287, 323, 359, 395, 426, 467, 503, 539, 575, 611, 642, 683, 719, 755, 791, 827, 858, 899, 935, 971, 1007, 1043, 1074, 1115, 1151, 1187, 1223, 1259, 1331, 1367, 1403, 1439, 1475, 1506, 1547, 1583