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A132475
Numerical equivalents for the 23 Latin letters, according to Tartaglia.
1
500, 300, 100, 500, 250, 40, 400, 200, 1, 51, 50, 1000, 90, 11, 400, 500, 80, 70, 160, 5, 10, 150, 2000
OFFSET
1,1
REFERENCES
A. R. Bradford, Crossword Lists, Collins.
Florian Cajori, A History of Mathematical Notations (1928, repr. Dover, 1993), para. 60.
G. Friedlein, Die Zahlzeichen und das elementare Rechnen der Griechen und Roemer, Erlangen, 1869.
Tartaglia, General Trattato di Numeri, Part I (1556), folios 4, 5.
LINKS
Recreational Groups, Roman Numerals, Postings by several authors.
EXAMPLE
A 500
B 300
C 100
D 500
E 250
F 40
G 400
H 200
I 1
K 51
L 50
M 1000
N 90
O 11
P 400
Q 500
R 80
S 70
T 160
V 5
X 10
Y 150
Z 2000
CROSSREFS
Sequence in context: A093945 A184146 A214191 * A220024 A251813 A372147
KEYWORD
nonn,base,fini,full
AUTHOR
N. J. A. Sloane, Nov 19 2007, based on email from David Garber and on material from the Roman Numerals web site mentioned above, especially a posting by Peter T. Daniels. Thanks to M. F. Hasler for finding this web site.
STATUS
approved