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A258264
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Numbers having only one representation as a sum of the minimal number of triangular numbers, A000217.
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3
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18, 20, 21, 22, 24, 25, 27, 28, 29, 30, 34, 36, 37, 38, 39, 43, 45, 48, 49, 50, 53, 55, 57, 58, 60, 61, 64, 65, 66, 67, 69, 70, 73, 78, 79, 83, 84, 87, 88, 90, 91, 92, 93, 97, 99, 100, 101, 102, 105, 108, 110
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OFFSET
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1,2
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COMMENTS
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LINKS
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MATHEMATICA
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t[n_] := n (n + 1)/2; ok[n_] := Block[{k = 1, t, tt = t /@ Range[ Sqrt[2*n]]}, While[{} == (r = IntegerPartitions[n, {k}, tt]), k++]; Length@ r == 1]; Select[Range[100], ok]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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