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Search: id:A096236
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| A096236 |
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Number of n-digit base-3 deletable primes. |
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+0
3
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| 1, 2, 4, 7, 13, 24, 38, 72, 122, 226, 400, 684, 1246, 2381, 4384, 8330, 15839, 30617, 58764, 113987, 221994, 434498, 852036, 1673320, 3296641, 6509179
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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A prime p is a base-b deletable prime if when written in base b it has the property that removing some digit leaves either the empty string or another deletable prime. "Digit" means digit in base b.
Deleting a digit cannot leave any leading zeros in the new string. For example, deleting the 2 in 2003 to obtain 003 is not allowed.
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CROSSREFS
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Cf. A080608, A080603, A096235-A096246.
Sequence in context: A093629 A018182 A005595 this_sequence A002574 A069765 A090427
Adjacent sequences: A096233 A096234 A096235 this_sequence A096237 A096238 A096239
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KEYWORD
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nonn,more
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AUTHOR
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Michael Kleber (kleber(AT)brandeis.edu), Feb 28 2003
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EXTENSIONS
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More terms from John W. Layman (layman(AT)math.vt.edu), Dec 14 2004
11 more terms from Ryan Propper (rpropper(AT)stanford.edu), Jul 19 2005
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