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A034593
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Cycle of 3 steps possible for 'concatenate a(n) and nextprime(a(n)) is a prime'.
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1
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467, 941, 8834, 9548, 13012, 22302, 23592, 26208, 47538, 58578, 78910, 86447, 86925, 116230, 118040, 123716, 128055, 213493, 234146, 238326, 273057, 285315, 286422, 389336, 399261, 457810, 468764, 481476, 502590, 525402, 541102, 570205
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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EXAMPLE
| E.g. a(n)=78910 -> nextprime(a(n)) is 78919 so '7891078919' is prime (=step 1); a(n2)=7891078919 -> nextprime(a(n2)) is 7891078931 so '78910789197891078931' is prime (=step 2); a(n3)=78910789197891078931 -> nextprime(a(n3)) is 78910789197891078949 so '7891078919789107893178910789197891078949' is prime (=step 3).
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CROSSREFS
| See also A034591-A034596, A030459.
Sequence in context: A069399 A145637 A051987 * A036339 A036340 A059395
Adjacent sequences: A034590 A034591 A034592 * A034594 A034595 A034596
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KEYWORD
| nonn,base
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.
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