OFFSET
1,2
COMMENTS
From Bernard Schott, Jan 26 2022: (Start)
Some subsequences, from Diophante and Crux Mathematicorum:
{(2*10^m-5)/15, m >= 1} = 1, 13, 133, 1333, ... = A097166.
{2*(4*10^m+5)/45, m >= 1} = 2, 18, 178, 1778, ...
{13*(26*100^m-125)/12375, m >= 2} = 273, 27313, 2731313, ... (End)
LINKS
Diophante, A1945 - Concaténations en tous genres (in French).
R. Hoshino, Astonishing Pairs of Numbers, Crux Mathematicorum 27(1), 2001, p. 39-44.
EXAMPLE
1+...+5 = 15; 2+...+7 = 27; 4+...+29 = 429; 13+...+53 = 1353; 18+...+63 = 1863.
133+...+533 = 133533.
273+...+2353 = 2732353.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Lekraj Beedassy, May 06 2002
EXTENSIONS
More terms from David W. Wilson, Jun 04 2002
Name edited by Michel Marcus, Jan 29 2022
STATUS
approved