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A054970
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Index numbers for palindromic hexagonal numbers.
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3
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0, 1, 2, 6, 39, 55, 87, 182, 556, 644, 797, 917, 1593, 1685, 25141, 51425, 55556, 83527, 810311, 1620213, 1853942, 5555556, 17352586, 17835196, 25004441, 91071921, 170563673, 181737182, 184252876, 507354403, 1240058219, 1783816196, 2756800387
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OFFSET
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1,3
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LINKS
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MATHEMATICA
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Select[Range[0, 10^6], PalindromeQ[PolygonalNumber[6, #]] &] (* Robert Price, Apr 27 2019 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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