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Search: id:A089316
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| A089316 |
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Prime worms [successive digit differences with absolute value of 2]. |
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+0
3
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| 131, 313, 353, 757, 797, 35353, 35753, 75797, 79757, 97579, 3131353, 3135313, 3531313, 7535797, 313131353, 313135313, 313579753, 353535313, 357531313, 357531353, 357535753, 357575753, 357975353, 753535357, 757975357, 975353579
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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Carlos Rivera's primepuzzles.net, Puzzle 246
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LINKS
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Carlos Rivera, Puzzle 246. The worm
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FORMULA
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Select prime numbers having the same first and last digits; if the uniform absolute value of successive digit differences is 2, add to sequence.
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EXAMPLE
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a(4)=797; first and last digits are 7; abs(7-9)=2;abs(9-7)=2; the worm is 7.
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CROSSREFS
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Cf. A089291.
This is a subset of A048399. Cf. A089291, A089315, A089317, A048398-A048405.
Sequence in context: A132249 A033548 A117477 this_sequence A142129 A068680 A142555
Adjacent sequences: A089313 A089314 A089315 this_sequence A089317 A089318 A089319
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KEYWORD
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easy,nonn,base
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AUTHOR
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Enoch Haga (Enokh(AT)comcast.net), Dec 25 2003
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