login
A116268
Numbers k such that k*(k+5) gives the concatenation of two numbers m and m-3.
5
81, 77394227, 89158933, 36623663376237623663376335, 37633762366336633762366235, 62366237633663366237633761, 63376336623762376336623661, 86194223018927804587702128
OFFSET
1,1
EXAMPLE
89158933 * 89158938 = 79493157//79493154, where // denotes concatenation.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved