A139132 The following sequence of French words has the property that it tells which letters in the sequence are vowels: un, quatre, cinq, huit, dix, quatorze, quinze, dix-huit, vingt et un, vingt-deux, ... Now replace the words with their numerical values.
1, 4, 5, 8, 10, 14, 15, 18, 21, 22, 24, 27, 29, 30, 33, 35, 38, 39, 42, 46, 48, 51, 56, 57, 60, 65, 66, 69, 71, 76, 80, 85, 86, 90, 93, 96, 99, 102, 103, 107, 110, 112, 117, 120, 122, 123, 127, 130, 132, 133, 136, 137, 139, 142, 144, 145, 148
Offset: 1
Examples
The first vowel is the "u" in "un", in position 1 (un), the second vowel is the "u" in "quatre", the fourth letter in the sentence (i.e. in position 4, quatre) and so on.
References
- E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.
Crossrefs
For an English version see A019270.
Extensions
More terms from Sean A. Irvine, Aug 27 2012
Comments