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 A019270 A self-descriptive sequence: positions of vowels in "one, three, seven,...". 5
 1, 3, 7, 8, 10, 12, 14, 15, 20, 24, 27, 29, 30, 33, 34, 37, 40, 41, 45, 51, 56, 57, 61, 66, 68, 72, 77, 79, 82, 88, 95, 96, 99, 104, 105, 109, 114, 116, 119, 124, 128, 130, 132, 137, 139, 141, 145, 147, 149, 154, 157, 162, 164, 167, 171, 173, 175, 180 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The following sequence of words has the property that it tells which letters in the sequence are vowels: one, three, seven, eight, ten, twelve, ... Now replace the words by their numerical values. If there is a choice, pick the smallest number (or word) that makes sense. Hyphens and spaces are ignored. REFERENCES E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris. LINKS Table of n, a(n) for n=1..58. EXAMPLE The first vowel is the "o" in "one", in position 1, the second vowel is the "e" in "one", the third letter in the sentence (i.e. in position 3) and so on. CROSSREFS See A139133 for a version involving consonants. See A139132 for a French version. Sequence in context: A030684 A276002 A089970 * A047357 A003607 A087859 Adjacent sequences: A019267 A019268 A019269 * A019271 A019272 A019273 KEYWORD word,nonn AUTHOR Scott Sauyet (ssauyet(AT)claude.math.wesleyan.edu) STATUS approved

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Last modified March 1 09:59 EST 2024. Contains 370432 sequences. (Running on oeis4.)