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Search: id:A054268
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| A054268 |
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Sum of composite numbers between prime p and nextprime(p) is a repdigit. |
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+0
10
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OFFSET
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0,1
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LINKS
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Eric Weisstein's World of Mathematics, Repdigit
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EXAMPLE
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a(5) is ok since between 259259257 and nextprime 259259261 we get the sum 259259258 + 259259259 + 259259260 which yield repdigit 777777777.
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CROSSREFS
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Cf. A010785, A028987, A028988, A046933, A054264, A054265, A054266, A054267.
Sequence in context: A003112 A130187 A054266 this_sequence A105526 A070743 A103993
Adjacent sequences: A054265 A054266 A054267 this_sequence A054269 A054270 A054271
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KEYWORD
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nonn,base,hard
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 15 2000.
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