A132475 Numerical equivalents for the 23 Latin letters, according to Tartaglia.

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

Table of n, a(n) for n=1..23.

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 A045215

Adjacent sequences: A132472 A132473 A132474 * A132476 A132477 A132478

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