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A030719
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Number of new terms at stage n in the formation of A030717.
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10
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1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 7, 8, 10, 12, 13, 16, 18, 20, 23, 25, 28, 31, 33, 36, 38, 41, 43, 45, 47, 50, 53, 56, 60, 62, 65, 69, 72, 78, 83, 86, 88, 92, 95, 99, 105, 110, 114, 117, 122, 125, 130, 136, 140, 144, 149, 153, 159, 162, 167, 173, 180, 184, 188
(list;
graph;
refs;
listen;
history;
text;
internal format)
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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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nn = 63; c[_] = 0; r = k = a[1] = c[1] = 1; Reap[Do[w = Union@ Array[a, k]; Do[Set[a[j + k], c[w[[j]]]], {j, Length[w]}]; Do[c[a[j + k]]++, {j, Length[w]}]; k += Sow[Length[w]], {nn}]][[-1, -1]] (* Michael De Vlieger, Nov 15 2022 *)
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PROG
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(Haskell)
a030719 n = a030719_list !! (n-1)
a030719_list = tail $ zipWith (-) (tail a253170_list) a253170_list
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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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