|
| |
|
|
A082655
|
|
Number of distinct letters needed to spell English names of numbers 1 through n.
|
|
0
| |
|
|
3, 5, 7, 9, 11, 13, 13, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| 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.
|
|
|
EXAMPLE
| "One" has three letters, "two" brings two new letters (t w), "three" brings two more (h r)...
|
|
|
CROSSREFS
| Cf. A005589, A052360, A052362-3.
Sequence in context: A151916 A187687 A056617 * A050828 A194391 A081534
Adjacent sequences: A082652 A082653 A082654 * A082656 A082657 A082658
|
|
|
KEYWORD
| easy,nonn,word
|
|
|
AUTHOR
| Peter F. Klammer (pklammer(AT)acm.org), May 17 2003
|
|
|
EXTENSIONS
| Edited by Don Reble (djr(AT)nk.ca), Nov 03 2003
|
| |
|
|
