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A116203
Numbers k such that k concatenated with k+6 gives the product of two numbers which differ by 9.
4
24, 26, 1014, 1196, 4280, 4646, 10512559797957763880, 22117246687805424846, 24058546574769555806, 25959521962351403984, 28059292876752476030, 45666404019969616806, 51120259070514684854, 56575813788698035286
OFFSET
1,1
EXAMPLE
4646//4652 = 6812 * 6821, where // denotes concatenation.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved