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A111650
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2n appears n times (n>0).
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6
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2, 4, 4, 6, 6, 6, 8, 8, 8, 8, 10, 10, 10, 10, 10, 12, 12, 12, 12, 12, 12, 14, 14, 14, 14, 14, 14, 14, 16, 16, 16, 16, 16, 16, 16, 16, 18, 18, 18, 18, 18, 18, 18, 18, 18, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 24, 24, 24, 24, 24, 24, 24
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Seen as a triangle read by rows: T(n,k) = 2*n, 1<=k<=n. - Reinhard Zumkeller, Mar 18 2011
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LINKS
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Reinhard Zumkeller, Rows n = 1..128 of triangle, flattened
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MATHEMATICA
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Table[Table[2n, n], {n, 12}]//Flatten (* Harvey P. Dale, Apr 21 2018 *)
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PROG
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(Haskell)
a111650 n k = a111650_tabl !! (n-1) !! (k-1)
a111650_row n = a111650_tabl !! (n-1)
a111650_tabl = iterate (\xs@(x:_) -> map (+ 2) (x:xs)) [2]
a111650_list = concat a111650_tabl
-- Reinhard Zumkeller, Nov 14 2015, Mar 18 2011
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CROSSREFS
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Cf. A000194, A111651, A111652.
Cf. A001650, A193832.
Sequence in context: A191682 A113724 A161794 * A156686 A210466 A085914
Adjacent sequences: A111647 A111648 A111649 * A111651 A111652 A111653
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KEYWORD
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easy,nonn,tabl
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AUTHOR
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Jonathan Vos Post, Aug 12 2005
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STATUS
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approved
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