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A158440
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Triangle T(n,k) read by rows: row n contains n times n+1 followed by n 1's.
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0
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2, 1, 3, 3, 1, 1, 4, 4, 4, 1, 1, 1, 5, 5, 5, 5, 1, 1, 1, 1, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 11, 11, 11, 11, 11, 11, 11
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OFFSET
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1,1
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COMMENTS
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These are essentially the non-reduced numerators of the coefficients of P(2n-1,x) of A130679, with denominators represented by A122197.
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LINKS
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Table of n, a(n) for n=1..97.
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EXAMPLE
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The triangle has 2n columns in row n. It starts:
2,1;
3,3,1,1;
4,4,4,1,1,1;
5,5,5,5,1,1,1,1;
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MATHEMATICA
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Flatten[Table[Join[PadRight[{}, n, n+1], PadRight[{}, n, 1]], {n, 12}]] (* Harvey P. Dale, Feb 18 2013 *)
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CROSSREFS
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Cf. A003057.
Sequence in context: A212634 A162883 A081446 * A119803 A195916 A110569
Adjacent sequences: A158437 A158438 A158439 * A158441 A158442 A158443
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KEYWORD
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nonn,easy,tabf
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AUTHOR
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Paul Curtz, Mar 19 2009
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EXTENSIONS
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Edited by R. J. Mathar, Apr 09 2009
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STATUS
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approved
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