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Search: id:A069617
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| A069617 |
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a(1) = 5; a(2n) = smallest prime that is a right concatenation of a(2n-1) and a number with no insignificant zeros and a(2n+1) = smallest prime ending in ( the least significant digits) a(2n-1). Alternate left and right concatenation yielding primes. |
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5
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| 5, 53, 353, 3533, 33533, 3353321, 113353321, 1133533213, 101133533213, 10113353321311, 310113353321311, 3101133533213117, 143101133533213117, 14310113353321311739, 314310113353321311739, 314310113353321311739103
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OFFSET
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1,1
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EXAMPLE
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a(4) = 3533 staring with a(3) =353 and a(5) = 33533 ending in a(4) = 3533.
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CROSSREFS
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Cf. A053582, A069605, A069606, A069607, A069608, A069609, A069610, A069611, A069613, A069614, A069615, A069616.
Sequence in context: A054342 A068170 A069632 this_sequence A058390 A069592 A065534
Adjacent sequences: A069614 A069615 A069616 this_sequence A069618 A069619 A069620
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KEYWORD
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nonn,base
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 27 2002
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EXTENSIONS
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More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 30 2003
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