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A116147
Numbers k such that k concatenated with k-2 gives the product of two numbers which differ by 9.
9
4962, 237412345332, 262912791034, 468307643502
OFFSET
1,1
COMMENTS
Also, numbers k such that k concatenated with k+6 gives the product of two numbers which differ by 7.
EXAMPLE
4962//4960 = 7040 * 7049, where // denotes concatenation.
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
EXTENSIONS
Edited by N. J. A. Sloane at the suggestion of Eric Desbiaux, Mar 23 2008
STATUS
approved