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 A109880 Numbers n such that n and its digit reversal both are difference of successive cubes. 1
 1, 7, 19, 91, 127, 721, 919, 14491, 19441, 113491, 177877, 194311, 778771, 1081801, 1188811, 1767169, 1927207, 1946491, 7027291, 9617671, 16056847, 74775169, 74865061, 96157747, 129869461, 164968921, 167828761, 180676081, 189202267, 757333297, 762202981, 792333757, 1917766117, 7116677191 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS A subsequence of A109879. LINKS EXAMPLE 19 = 3^3-2^3 and 91 = 6^3-5^3. MATHEMATICA okQ[x_]:=Module[{revx=FromDigits[Reverse[IntegerDigits[x]]]}, And@@(And@@IntegerQ/@(n/.Solve[1+3n+3n^2==x, n])&&And@@IntegerQ/@(n/.Solve[1+3n+3n^2==revx, n]))] Select[Range[90000], okQ] - Harvey P. Dale, Aug 06 2007 CROSSREFS Cf. A109879. Sequence in context: A267378 A088988 A109879 * A245489 A084603 A088883 Adjacent sequences:  A109877 A109878 A109879 * A109881 A109882 A109883 KEYWORD base,nonn AUTHOR Amarnath Murthy, Jul 10 2005 EXTENSIONS More terms from Harvey P. Dale, Aug 06 2007 23 more terms from Donovan Johnson, Feb 21 2008 STATUS approved

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Last modified December 4 22:42 EST 2021. Contains 349526 sequences. (Running on oeis4.)