|
|
A261545
|
|
a(n) indicates which letter of the English alphabet is the n-th most common.
|
|
0
|
|
|
5, 20, 1, 15, 9, 14, 19, 18, 8, 12, 4, 3, 21, 13, 6, 16, 7, 23, 25, 2, 22, 11, 24, 10, 17, 26
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
This is according to Mayzner revisited (Peter Norvig), Cornell, British National Corpus and the Brown corpus.
|
|
REFERENCES
|
Martin Gardner, "Codes, Ciphers, and Secret Writing." Dover Publications, Inc. New York 1984.
M. S. Mayzner, Margaret Elizabeth Tresselt, "Tables of Single-letter and Digram Frequency Counts for Various Word-length and Letter-position Combinations," Psychonomic Press, 1965.
A. Young," Mathematical Ciphers: From Caesar to RSA." Mathematical World, Volume 25. American Mathematical Society 2006.
|
|
LINKS
|
|
|
EXAMPLE
|
The most common letter of the English alphabet is the fifth letter 'E', so a(1)=5; the second most common letter is the twentieth letter 'T', so a(2)=20; the third most common letter is 'A', so a(3)=1; etc.
|
|
MATHEMATICA
|
ToCharacterCode["etaoinsrhldcumfpgwybvkxjqz"] - 96
|
|
CROSSREFS
|
|
|
KEYWORD
|
fini,full,nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|