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Positions of vowels in "one, two, three, four, five, six, ...".
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%I #19 Aug 11 2020 12:54:07

%S 1,3,6,10,11,13,14,17,19,21,24,26,28,29,34,36,38,40,42,44,48,51,54,57,

%T 58,61,62,65,66,69,72,73,76,79,80,83,85,88,89,91,92,96,97,100,102,104,

%U 105,109,115,119,121,124,130,133,140,141,144,149,150,154,159,161,164,169

%N Positions of vowels in "one, two, three, four, five, six, ...".

%C Consider only letters, but not spaces or punctuation.

%H M. F. Hasler, <a href="/A241858/b241858.txt">Table of n, a(n) for n = 1..10^4</a>

%e The letters in "four" are the twelfth through fifteenth letters in "one, two, three, four, five, six, ...". The o and u, which are 13 and 14, are vowels.

%o (PARI) A241858_vec(N,v=Vec("aeiou"),n,s,p,o)=vector(N,j, until( setsearch(v,s[p-o]), o+#s<p++ && o+=#s+!s=[c|c<-Vec(English(n+=1)),c>"@"]); p) \\ see A052360 for English(). - _M. F. Hasler_, Aug 11 2020

%Y Cf. A005589, A052360.

%K nonn,word

%O 1,2

%A _J. Lowell_, Apr 30 2014

%E More terms from _Alois P. Heinz_, Apr 30 2014

%E a(62)-a(64) from _M. F. Hasler_, Aug 11 2020