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Search: id:A072040
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| A072040 |
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Numbers n of the form k + reverse(k) for exactly two k. |
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+0
4
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| 22, 187, 202, 222, 242, 262, 282, 302, 322, 342, 362, 382, 1717, 1737, 1757, 1777, 1797, 1817, 1837, 1857, 1877, 1897, 2002, 2871, 3982, 11211, 11411, 11611, 11811, 12011, 12211, 12411, 12611, 12811, 17017, 18128, 18997, 19888, 20002, 20202
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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In the cognate sequence A071265 two numbers a and b are counted only once, if n = a + b, a = reverse(b), b = reverse(a). Therefore 187 = 89 + 98 = 98 + 89 does not appear in A071265.
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LINKS
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Index entries for sequences related to Reverse and Add!
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EXAMPLE
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22 = 11 + 11 = 20 + 02, 187 = 89 + 98 = 98 + 89, 382 = 191 + 191 = 290 + 092.
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CROSSREFS
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Cf. A067030, A071265, A072041.
Adjacent sequences: A072037 A072038 A072039 this_sequence A072041 A072042 A072043
Sequence in context: A126517 A107969 A129126 this_sequence A022682 A107959 A110690
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KEYWORD
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base,nonn
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AUTHOR
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Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jun 08 2002
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