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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS These are essentially the non-reduced numerators of the coefficients of P(2n-1,x) of A130679, with denominators represented by A122197. LINKS 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: A212634 A162883 A081446 * A119803 A195916 A110569 Adjacent sequences:  A158437 A158438 A158439 * A158441 A158442 A158443 KEYWORD nonn,easy,tabf AUTHOR Paul Curtz, Mar 19 2009 EXTENSIONS Edited by R. J. Mathar, Apr 09 2009 STATUS approved

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