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Search: id:A034818
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| A034818 |
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Concatenations C1 and C2 and C3 are all prime (see the comment lines). |
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+0
1
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| 657, 4929, 10647, 18291, 20907, 22653, 27381, 28053, 28671, 42471, 48441, 57363, 69651, 79569, 89853, 93261, 95967, 101283, 110763, 119481, 128613, 145719, 149409, 174993, 201417, 204861, 205329, 221883, 248391, 269199, 272799, 293451
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OFFSET
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0,1
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COMMENT
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C1 = 'nextprime(n) followed by n'
C2 = 'n followed by prevprime(n)'
C3 = 'nextprime(n) followed by n followed by prevprime(n)'
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EXAMPLE
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n=95967 -> next prime is 95971, previous prime is 95959, thus '9597195967' and '9596795959' and '959719596795959' are all three primes.
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CROSSREFS
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Cf. A034808-A034821.
Sequence in context: A088894 A015277 A135418 this_sequence A068260 A023294 A067235
Adjacent sequences: A034815 A034816 A034817 this_sequence A034819 A034820 A034821
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KEYWORD
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nonn,base
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.
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