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A116130
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Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 5.
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10
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8, 98, 590, 738, 830, 998, 1080, 4508, 9998, 20660, 29754, 99998, 980300, 999998, 6694218, 9999998, 49826988, 99999998, 117738578, 131505858, 132231404, 176445054, 177285320, 247979808, 252028388, 335180054, 336337790
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OFFSET
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1,1
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COMMENTS
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Also numbers k such that k concatenated with itself gives the product of two numbers which differ by 3.
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LINKS
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EXAMPLE
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7531357568//7531357564 = 8678339452 * 8678339457, where // denotes concatenation.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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