A139282 Form a sequence of words as follows: look to the left, towards the beginning of the sequence and write down the number of vowels you see; repeat; then replace the words with the corresponding numbers.

0, 2, 3, 5, 7, 9, 11, 14, 18, 22, 24, 27, 30, 31, 34, 37, 40, 41, 44, 47, 50, 51, 54, 57, 60, 61, 64, 67, 70, 72, 75, 79, 83, 87, 91, 95, 99, 103, 110, 116, 124, 132, 139, 147, 155, 163, 171, 180, 187, 196, 204, 210, 215, 222, 228, 235, 242, 248, 255, 262, 268, 275

Offset

0,2

Comments

The sequence of words is: zero, two, three, five, seven, nine, eleven, fourteen, ...

Hyphens and spaces are not counted.

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=0..61.

Example

The second word is "two" (and so a(2)=2), because at the end of the first word we can see two vowels (the vowels in "zero") to the left.

Crossrefs

For a French version see A139212.

Sequence in context: A056834 A183140 A286283 * A228121 A323648 A353037

Adjacent sequences: A139279 A139280 A139281 * A139283 A139284 A139285

Keyword

nonn,word,easy

Author

N. J. A. Sloane, Jun 08 2008

Extensions

Cross reference corrected by Sean A. Irvine, Mar 15 2010

More terms from Sean A. Irvine, Mar 15 2010

Status

approved