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Arrange 1-digit numbers in Spanish in alphabetical order, then 2-digit numbers, then 3-digit numbers, etc.
3

%I #21 Sep 20 2020 01:09:57

%S 0,5,4,2,9,8,6,7,3,1,14,50,55,54,52,59,58,56,57,53,51,40,45,44,42,49,

%T 48,46,47,43,41,19,18,16,17,10,12,90,95,94,92,99,98,96,97,93,91,80,85,

%U 84,82,89,88,86,87,83,81,11,15,60,65,64,62,69,68,66,67,63,61,70,75,74,72

%N Arrange 1-digit numbers in Spanish in alphabetical order, then 2-digit numbers, then 3-digit numbers, etc.

%C In the 2007 Spanish film "Fermat's Room", a mathematician solves the "enigma" of how the numbers 5, 4, 2, 9, 8, 6, 7, 3, 1 are ordered. - _Jonathan Sondow_, Jul 20 2012

%H Álvar Ibeas, <a href="/A097960/b097960.txt">Table of n, a(n) for n = 1..10001</a>

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Fermat&#39;s_Room">Fermat's Room</a>

%e 0="cero", 5="cinco", 4="cuatro", 2="dos", 9="nueve", 8="ocho", 6="seis", 7="siete", 3="tres", 1="un".

%Y Cf. A000052 (English).

%K easy,nonn,word,base

%O 1,2

%A Colin Backhurst (colin.backhurst(AT)ntlworld.com), Sep 21 2004