OFFSET
1,1
COMMENTS
By construction, all integers have here an odd number of digits and an odd number of letters in their French translation.
LINKS
Jean-Marc Falcoz, Table of n, a(n) for n = 1..1001
Eric Angelini, Des suites inouïes, Maths étonnantes, Tangente, No. 189, juillet-août 2019, p. 29.
Nicolas Graner, Les grands nombres en français. This link explains why the authors didn't take into account the letters B, J, K, W and Y.
EXAMPLE
The sequence starts with 331, 233, 10177, 224, 10314, and the central (underlined) digits are 3,3,1,2,3,... which are precisely the digits starting the sequence itself; now the successive 5 unique central letters of the above 5 French terms are T, R, O, I, S and this spells the beginning of TROIS CENT TRENTE ET UN, the term a(1).
The first term diverging from A319718 is a(21) = [TROISC(E)NTDEUX, 302] as a(21) is the smallest integer > a(16) = [DEUXC(E)NTSIX, 206], both having a central (underlined) letter E.
CROSSREFS
KEYWORD
base,nonn,word
AUTHOR
Eric Angelini and Jean-Marc Falcoz, Oct 01 2018
STATUS
approved