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A140978
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Repeat (n+1)^2 n times.
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5
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4, 9, 9, 16, 16, 16, 25, 25, 25, 25, 36, 36, 36, 36, 36, 49, 49, 49, 49, 49, 49, 64, 64, 64, 64, 64, 64, 64, 81, 81, 81, 81, 81, 81, 81, 81, 100, 100, 100, 100, 100, 100, 100, 100, 100, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121
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OFFSET
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1,1
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COMMENTS
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Frenicle writes the entries in the form a(n) = A055096(n)-A133819(n), with the flattened index view of A133819: 4=5-1, 9=10-1, 9=13-4, 16=17-1, 16=20-4, 16=25-9 etc.
Also triangle T(n, k) = (n+1)^2, 1<=k<=n. - Michel Marcus, Feb 03 2013
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LINKS
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FORMULA
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MATHEMATICA
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Table[PadRight[{}, n, (n+1)^2], {n, 10}]//Flatten (* Harvey P. Dale, Oct 10 2019 *)
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PROG
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(Haskell)
a140978 n k = a140978_tabl !! (n-1) !! (k-1)
a140978_row n = a140978_tabl !! (n-1)
a140978_tabl = map snd $ iterate
(\(i, xs@(x:_)) -> (i + 2, map (+ i) (x:xs))) (5, [4])
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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