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A093218
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a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 18.
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1
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0, 900, 99000, 8892880288, 9889208802088, 9988920088020088, 9998892000880200088, 9999889200008802000088, 9999988920000088020000088, 9999998892000000880200000088, 9999999889200000008802000000088, 9999999988920000000088020000000088
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OFFSET
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1,2
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COMMENTS
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For n > 3, is a(n) of the form [(n-4) 9's]8892[(n-4) 0's]8802[(n-4) 0's]88? - David A. Corneth, Oct 25 2017
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LINKS
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EXAMPLE
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a(3) is 99000 because its length-3 substrings (990, 900, 000) are all distinct and divisible by 18 and there is no larger number with this property.
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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