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A074242
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Numbers n such that sigma(n+1) = reverse(sigma(n)).
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1
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OFFSET
| 1,1
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EXAMPLE
| sigma(5602 + 1) = 6048 = reverse(8406) = reverse(sigma(5602)), so 5602 is a term of the sequence.
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MATHEMATICA
| Do[ If[FromDigits[Reverse[IntegerDigits[DivisorSigma[1, n]]]] == DivisorSigma[1, n + 1], Print[n]], {n, 1, 10^7}]
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CROSSREFS
| Sequence in context: A109565 A126784 A071813 * A032737 A198164 A058003
Adjacent sequences: A074239 A074240 A074241 * A074243 A074244 A074245
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KEYWORD
| base,more,nonn
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AUTHOR
| Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Sep 19 2002
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EXTENSIONS
| a(3)-a(4) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Feb 01 2009
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