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A084390
a(n) is the smallest positive integer > a(n-1) with exactly n letters when spelled in English.
3
1, 4, 7, 11, 15, 18, 21, 24, 27, 73, 101, 104, 107, 111, 115, 118, 121, 124, 127, 173, 323, 373, 1104, 1107, 1111, 1115, 1118, 1121, 1124, 1127, 1173, 1323, 1373, 3323, 3373, 11373, 13323, 13373, 17373, 23323, 23373, 73373, 101373, 103323, 103373, 111373
OFFSET
3,2
COMMENTS
This uses the conventions that "and" is never used and two-digit numbers are not used before "hundred". The sequence is labeled "finite" because there is no widely accepted naming convention for arbitrarily large numbers. - David Wasserman, Dec 20 2004
LINKS
Andrew Bolt et al., Maths fun, rec.puzzles group.
jaysmith et al., Number sequence - spot the pattern, rec.puzzles group.
Wikipedia, English numerals
EXAMPLE
a(5) = 7 because 'seven' has 5 letters.
CROSSREFS
Cf. A080777.
Sequence in context: A267049 A310735 A003670 * A101741 A247432 A310736
KEYWORD
easy,nonn,word,fini
AUTHOR
James Ong (blackshadowshade(AT)yahoo.com.au), Jun 27 2003
EXTENSIONS
More terms from David Wasserman, Dec 20 2004
STATUS
approved