A108987 French self-ranked numbers.
1, 2, 8, 12, 20, 21, 22, 29, 42, 52, 58, 85, 91, 142, 185, 208, 212, 229, 243, 291, 351, 420, 452, 514, 720, 821, 1142, 1212, 1243, 1254, 1391, 1420, 2021, 2058, 2124, 2125, 2291, 2413, 3514, 3912, 4208, 4720, 5212, 5452, 5821, 8219, 9121, 9351, 12125
Offset: 0
Examples
"1" is in the sequence because if you replace each letter of "un" ("one") by its rank in the alphabet you get the string 2114 which contains at least a "1".
"trois" (3) produces the string 201815919 which contains no "3" - thus "3" is not a "French self-ranked number".