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Search: id:A007513
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| A007513 |
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a(n) = initial prime of n consecutive primes such that first and last have same digit sum.
(Formerly M2186)
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+0
3
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| 2, 523, 109, 79, 2, 13, 5, 127, 47, 17, 5, 127, 53, 17, 7, 67, 31, 37, 47, 37, 83, 11, 43, 19, 157, 2, 37, 5, 47, 5, 19, 67, 7, 29, 19, 53, 31, 73, 53, 29, 139, 13, 67, 83, 7, 47, 29, 17, 79, 7, 19, 37, 59, 43, 271, 19, 29
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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J. R. Smart, A new function from a table of primes, J. Rec. Math., 7 (No. 4, 1974), 293-294.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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EXAMPLE
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523 and 541 are first pair of consecutive primes with same sum of digits (10).
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CROSSREFS
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Sequence in context: A139302 A003391 A080778 this_sequence A071613 A101702 A119780
Adjacent sequences: A007510 A007511 A007512 this_sequence A007514 A007515 A007516
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KEYWORD
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base,nonn,easy,nice,more
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Robert G. Wilson v (rgwv(AT)rgwv.com)
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