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Search: id:A093221
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| A093221 |
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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 21. |
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+0
1
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| 0, 8421, 75672, 760273087, 7677679779737737, 99997899997, 777300377790097776006777, 7777778477777721777777, 77777752577777725277777752, 7777770021777777008477777700
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Hans Havermann, Table of A093211-A093299
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EXAMPLE
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a(2) is 8421 because its length-2 substrings (84, 42, 21) are all distinct and divisible by 21, and there is no larger number with this property
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CROSSREFS
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Cf. A093211, A093212, ..., A093299.
Sequence in context: A049357 A069402 A139005 this_sequence A023321 A116258 A116311
Adjacent sequences: A093218 A093219 A093220 this_sequence A093222 A093223 A093224
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KEYWORD
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base,nonn
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AUTHOR
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Hans Havermann (pxp(AT)rogers.com), Mar 28 2004
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