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Search: id:A059798
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| A059798 |
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Primes p such that |p - q| is a square, where q is the reversal of p. |
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+0
2
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| 23, 37, 43, 59, 67, 73, 89, 1237, 1567, 1787, 1907, 2141, 2251, 2297, 2633, 2963, 3019, 4079, 4253, 4363, 4583, 6637, 6701, 6857, 6967, 7211, 7321, 7541, 8147, 8419, 8923, 8969, 9103, 9323, 9433, 29303, 29803, 40093, 40193, 40493, 40693, 40993
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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Subtract reversal of prime from prime. Take absolute value. If a square, add to sequence.
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EXAMPLE
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a(7)=1237. Reverse is 7321 so 7321-1237=6084, and 6084 is a square whose root is 78.
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CROSSREFS
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Cf. A059799.
Sequence in context: A049851 A120147 A045533 this_sequence A110673 A134797 A055114
Adjacent sequences: A059795 A059796 A059797 this_sequence A059799 A059800 A059801
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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), Feb 23 2001
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