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Search: id:A090148
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| A090148 |
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Primes of the form identical digits followed by a 9. |
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+0
3
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| 19, 29, 59, 79, 89, 229, 449, 11119, 22229, 44449, 111119, 444449, 11111119, 55555559, 555555555559, 22222222222229, 88888888888889, 11111111111111119, 88888888888888889, 555555555555555559, 55555555555555555555555559
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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Select[ FromDigits /@ Flatten[ Table[ PadLeft[{9}, i, # ] & /@ {1, 2, 3, 4, 5, 6, 7, 8, 9}, {i, 2, 16}], 1], PrimeQ[ # ] &]
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CROSSREFS
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Sequence in context: A004618 A030433 A141311 this_sequence A136071 A088998 A139886
Adjacent sequences: A090145 A090146 A090147 this_sequence A090149 A090150 A090151
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KEYWORD
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nonn,base
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 22 2003
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