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Search: id:A111488
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| A111488 |
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Primes all of whose digits are triangular. |
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+0
1
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| 3, 11, 13, 31, 61, 101, 103, 113, 131, 163, 311, 313, 331, 601, 613, 631, 661, 1013, 1031, 1033, 1061, 1063, 1103, 1163, 1301, 1303, 1361, 1601, 1613, 1663, 3001, 3011, 3061, 3163, 3301, 3313, 3331, 3361, 3613, 3631, 6011, 6101, 6113, 6131, 6133, 6163
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Includes all repunit primes. Conjecture: an infinite sequence. Note twin primes: (11, 13), (101, 103), (311, 313), (1031, 1033), (1061, 1063), (1301, 1303), (6131, 6133), (10301, 10303), (10331, 10333), (13001, 13003).
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CROSSREFS
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Cf. A000040, A000217.
Sequence in context: A032917 A006559 A023248 this_sequence A125308 A020451 A018450
Adjacent sequences: A111485 A111486 A111487 this_sequence A111489 A111490 A111491
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KEYWORD
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base,easy,nonn
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AUTHOR
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Jonathan Vos Post (jvospost3(AT)gmail.com), Nov 15 2005
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EXTENSIONS
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Corrected by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 19 2005
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