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

%I A132475 #6 Jul 09 2025 04:27:37
%S A132475 500,300,100,500,250,40,400,200,1,51,50,1000,90,11,400,500,80,70,160,
%T A132475 5,10,150,2000
%N A132475 Numerical equivalents for the 23 Latin letters, according to Tartaglia.
%D A132475 A. R. Bradford, Crossword Lists, Collins.
%D A132475 Florian Cajori, A History of Mathematical Notations (1928, repr. Dover, 1993), para. 60.
%D A132475 G. Friedlein, Die Zahlzeichen und das elementare Rechnen der Griechen und Roemer, Erlangen, 1869.
%D A132475 Tartaglia, General Trattato di Numeri, Part I (1556), folios 4, 5.
%H A132475 Recreational Groups, <a href="http://www.n-n-a.com/recreational/about51344.html">Roman Numerals</a>, Postings by several authors.
%e A132475 A 500
%e A132475 B 300
%e A132475 C 100
%e A132475 D 500
%e A132475 E 250
%e A132475 F 40
%e A132475 G 400
%e A132475 H 200
%e A132475 I 1
%e A132475 K 51
%e A132475 L 50
%e A132475 M 1000
%e A132475 N 90
%e A132475 O 11
%e A132475 P 400
%e A132475 Q 500
%e A132475 R 80
%e A132475 S 70
%e A132475 T 160
%e A132475 V 5
%e A132475 X 10
%e A132475 Y 150
%e A132475 Z 2000
%K A132475 nonn,base,fini,full
%O A132475 1,1
%A A132475 _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