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 A128408 Triangle read by rows: A128407 * A051731 as infinite lower triangular matrices. 4
 1, -1, -1, -1, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, -1, 1, 1, 1, 0, 0, 1, -1, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Left and right borders = mu(n), A008683. Row sums = A008966: (1, -2, -2, 0, -2, 4, -2, 0, 0, 4, ...). A128408 * [1,2,3,...] = A063441: (1, -3, -4, 0, -6, 12, ...). A054524 = A051731 * A128407. LINKS Table of n, a(n) for n=1..105. EXAMPLE First few rows of the triangle: 1; -1, -1; -1, 0, -1; 0, 0, 0, 0; -1, 0, 0, 0, -1; 1, 1, 1, 0, 0, 1; ... CROSSREFS Cf. A008683, A008966, A054524, A063441, A128407. Sequence in context: A055132 A285403 A183918 * A121802 A156241 A156254 Adjacent sequences: A128405 A128406 A128407 * A128409 A128410 A128411 KEYWORD tabl,sign AUTHOR Gary W. Adamson, Mar 01 2007 EXTENSIONS a(45) = 0 inserted and more terms from Georg Fischer, Jun 05 2023 STATUS approved

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Last modified September 22 07:21 EDT 2023. Contains 365519 sequences. (Running on oeis4.)