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A122493
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Union of Fibonacci and triangular numbers.
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1
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0, 1, 2, 3, 5, 6, 8, 10, 13, 15, 21, 28, 34, 36, 45, 55, 66, 78, 89, 91, 105, 120, 136, 144, 153, 171, 190, 210, 231, 233, 253, 276, 300, 325, 351, 377, 378, 406, 435, 465, 496, 528, 561, 595, 610, 630, 666, 703, 741, 780, 820, 861, 903, 946, 987, 990, 1035, 1081
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OFFSET
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0,3
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LINKS
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MAPLE
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#does not generate terms in order# with(combinat, fibonacci): for i from 1 to 20 do fibonacci(i); sum(k, k=0..i); end do;
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MATHEMATICA
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Module[{upto=1100, f=1, tr}, While[Fibonacci[f]<upto, f++]; tr=Ceiling[ (Sqrt[ 1+8*upto]-1)/2]; Select[Join[Fibonacci[Range[0, f]], Accumulate[ Range[ tr]]]// Union, #<=upto&]] (* Harvey P. Dale, Oct 21 2016 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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