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Search: id:A087700
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| A087700 |
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a(1) = 1, a(n) = smallest number such that the n-th partial concatenation has n divisors. |
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+0
2
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OFFSET
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1,3
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COMMENT
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Next term is about 6.4*10^150 and is too large to include. - David Wasserman (wasserma(AT)spawar.navy.mil), Jun 16 2005
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EXAMPLE
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1,11,11449,114491, etc. have 1, 2, 3 and 4 divisors respectively.
11449= 107^2, 114491 = 13*8807.
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CROSSREFS
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Adjacent sequences: A087697 A087698 A087699 this_sequence A087701 A087702 A087703
Sequence in context: A048632 A120104 A071104 this_sequence A107666 A020466 A142420
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KEYWORD
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base,easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 26 2003
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EXTENSIONS
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One more term from David Wasserman (wasserma(AT)spawar.navy.mil), Jun 16 2005
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