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A050760
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Triangular numbers whose decimal expansion contains no pair of consecutive equal digits.
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2
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0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 78, 91, 105, 120, 136, 153, 171, 190, 210, 231, 253, 276, 325, 351, 378, 406, 435, 465, 496, 528, 561, 595, 630, 703, 741, 780, 820, 861, 903, 946, 1035, 1081, 1275, 1326, 1378, 1431, 1485, 1540, 1596, 1653, 1830, 1891
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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COMMENTS
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LINKS
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MATHEMATICA
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Select[Accumulate[Range[0, 70]], FreeQ[Differences[IntegerDigits[#]], 0]&] (* Harvey P. Dale, Jun 20 2021 *)
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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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