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Search: id:A088261
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| A088261 |
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Smallest number prefixed with corresponding term of the sequence of numbers == 1, 3, 7 or 9 (mod 10), i.e. (1, 3, 7, 9, 11, 13, 17, 19, 21, 23, 27, 29, 31, 33, 37, 39, ...) that yields a prime. |
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+0
1
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| 1, 1, 1, 1, 2, 1, 3, 4, 4, 2, 1, 2, 1, 2, 1, 1, 2, 4, 3, 1, 1, 3, 1, 3, 4, 1, 1, 2, 2, 1, 2, 1, 1, 2, 4, 3, 1, 1, 1, 1, 5, 1, 5, 1, 2, 2, 1, 3, 3, 1, 4, 1, 2, 4, 2, 4, 2, 2, 5, 11, 1, 1, 4, 4, 2, 1, 3, 3, 1, 6, 4, 2, 1, 13, 1, 5, 3, 1, 5, 6, 1, 2, 2, 3, 4, 1, 1, 4, 2, 1, 5, 1, 1, 5, 1, 2, 4, 2, 6, 1, 2, 3, 3, 1, 4
(list; graph; listen)
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OFFSET
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0,5
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EXAMPLE
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The term corresponding to 61 is 4 as 161, 261 and 361 are composite.
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CROSSREFS
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Sequence in context: A128270 A097003 A109447 this_sequence A033779 A033799 A085985
Adjacent sequences: A088258 A088259 A088260 this_sequence A088262 A088263 A088264
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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 28 2003
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EXTENSIONS
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More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jul 27 2005
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