OFFSET
1,1
COMMENTS
a(5) should be findable, but a(6) will probably not be well defined.
See A362441 for a British English version.
REFERENCES
GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See pages 92 and 275.
FORMULA
a(n) = A080777(a(n-1)) for n > 1. - Michael S. Branicky, Apr 22 2023
EXAMPLE
a(2) = 11 since "eleven" is the smallest number with 6 letters.
a(3) = 23 since "twenty three" is the smallest with 11 letters.
CROSSREFS
KEYWORD
nonn,word,more
AUTHOR
N. J. A. Sloane, Apr 22 2023
EXTENSIONS
a(5) from Michael S. Branicky, Apr 22 2023 using A080777
STATUS
approved