Two sequences we want in English

This (French) sequence is the longest (so far) of distinct nonnegative integers sharing bijectively one and only one letter with the next term. The sequence stops after 35 terms.

The hereunder (French) sequence is (hopefully) the lexicographically earliest one of distinct nonnegative integers such that the last letter of a(n) is the same as the first letter of a(n+1); the sequence is infinite:

(many thanks to Gilles Esposito-Farèse and Nicolas Graner)











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