NB: I suspect the number you are thinking of is a 2530 digit sequence on a 4-digit lock, not 153 on 5... https://en.wikipedia.org/wiki/De_Bruijn_sequence#Uses

NB: I suspect the number you are thinking of is a 2530 digit sequence on a 4-digit lock, not 153 on 5... https://en.wikipedia.org/wiki/De_Bruijn_sequence#Uses https://en.wikipedia.org/wiki/De_Bruijn_sequence#Uses