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1, 3, 4, 6, 10, 15, 16, 18, 21, 28, 36, 45, 46, 48, 51, 55, 66, 78, 91, 105, 106, 108, 111, 115, 120, 136, 153, 171, 190, 210, 211, 213, 216, 220, 225, 231, 253, 276, 300, 325, 351, 378, 379, 381, 384, 388, 393, 399, 406, 435, 465, 496, 528, 561, 595, 630
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
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MATHEMATICA
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Accumulate[Table[If[OddQ[Sqrt[8n+1]], Range[(Sqrt[8n+1]-1)/2], n], {n, 50}]// Flatten] (* Harvey P. Dale, Jun 01 2020 *)
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PROG
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(Haskell)
a255879 n = a255879_list !! (n-1)
a255879_list = scanl1 (+) a256188_list
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CROSSREFS
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Cf. A256188, A255437.
Sequence in context: A302340 A310003 A085378 * A171096 A125869 A059618
Adjacent sequences: A255876 A255877 A255878 * A255880 A255881 A255882
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller, Mar 26 2015
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STATUS
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approved
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