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A158440
Triangle T(n,k) read by rows: row n contains n times n+1 followed by n 1's.
0
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
OFFSET
1,1
COMMENTS
These are essentially the unreduced numerators of the coefficients of P(2n-1,x) of A130679, with denominators represented by A122197.
EXAMPLE
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;
MATHEMATICA
Flatten[Table[Join[PadRight[{}, n, n+1], PadRight[{}, n, 1]], {n, 12}]] (* Harvey P. Dale, Feb 18 2013 *)
CROSSREFS
Cf. A003057.
Sequence in context: A081446 A274309 A374630 * A119803 A195916 A245554
KEYWORD
nonn,easy,tabf
AUTHOR
Paul Curtz, Mar 19 2009
EXTENSIONS
Edited by R. J. Mathar, Apr 09 2009
STATUS
approved