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A104143 Take any three consecutive terms and write them down (in French): their letters sum up to a square number. This is the slowest strictly increasing such sequence. 0
1, 2, 6, 21, 43, 44, 50, 52, 53, 103, 121, 123, 197, 203, 204 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Starting with "0,1" would give another sequence.

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

1 2 6 = "un+deux+six" = 9 letters; 9 is 3^2.

197 203 204 = "cent quatre-vingt-dix-sept + deux cent trois + deux cent quatre" = 49 letters; 49 is 7^2.

CROSSREFS

Sequence in context: A063753 A066893 A004192 * A088812 A228398 A228394

Adjacent sequences:  A104140 A104141 A104142 * A104144 A104145 A104146

KEYWORD

base,easy,nonn,word

AUTHOR

Eric Angelini, Mar 07 2005

STATUS

approved

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Last modified March 23 05:36 EDT 2019. Contains 321422 sequences. (Running on oeis4.)