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Search: id:A090540
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| A090540 |
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Beginning with 3, least prime obtained by sandwiching the previous term between strings of identical digits. |
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+0
1
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| 3, 131, 11311, 771131177, 33337711311773333, 77777733337711311773333777777, 3777777333377113117733337777773, 33377777733337711311773333777777333, 333333337777773333771131177333377777733333333, 9933333333777777333377113117733337777773333333399, 33333993333333377777733337711311773333777777333333339933333
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Questions: (1) Is this sequence infinite? (2) If so, are the digits equally distributed? - Stefan Steinerberger (hansibal(AT)hotmail.com), Nov 08 2005
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CROSSREFS
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Adjacent sequences: A090537 A090538 A090539 this_sequence A090541 A090542 A090543
Sequence in context: A075597 A082563 A083999 this_sequence A048796 A152435 A051376
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 09 2003
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EXTENSIONS
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a(6)-a(8) from Jim Nastos (nastos(AT)gmail.com), Jan 30 2004
a(9)-a(11) from Stefan Steinerberger (hansibal(AT)hotmail.com), Nov 08 2005
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