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Search: id:A082655
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| A082655 |
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Number of distinct letters needed to spell English names of numbers 1 through n. |
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+0
1
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| 3, 5, 7, 9, 11, 13, 13, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Late increases are at twentY, hunDred, thousAnd, Million, Billion, Quadrillion, sePtillion, oCtillion.
Only J and K are never used for English number names. Z is used only for zero.
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EXAMPLE
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"One" has three letters, "two" brings two new letters (t w), "three" brings two more (h r)...
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CROSSREFS
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Cf. A005589, A052360, A052362-3.
Sequence in context: A158919 A151916 A056617 this_sequence A050828 A081534 A097218
Adjacent sequences: A082652 A082653 A082654 this_sequence A082656 A082657 A082658
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KEYWORD
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easy,nonn,word
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AUTHOR
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Peter F. Klammer (pklammer(AT)acm.org), May 17 2003
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EXTENSIONS
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Edited by Don Reble (djr(AT)nk.ca), Nov 03 2003
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