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 A128431 Triangle read by rows: A054521 * A128407. 0
 1, 1, 0, 1, -1, 0, 1, 0, -1, 0, 1, -1, -1, 0, 0, 1, 0, 0, 0, -1, 0, 1, -1, -1, 0, -1, 1, 0, 1, 0, -1, 0, -1, 0, -1, 0, 1, -1, 0, 0, -1, 0, -1, 0, 0, 1, 0, -1, 0, 0, 0, -1, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row sums = A112399: (1, 1, 0, 0, -1, 0, -1, -2, -2, -1,...) LINKS FORMULA A054521 * A128407 as infinite lower triangular matrices. EXAMPLE First few rows of the triangle are: 1; 1, 0; 1, -1, 0; 1, 0, -1, 0; 1, -1, -1, 0, 0; 1, 0, 0, 0, -1, 0; 1, -1, -1, 0, -1, 1, 0; CROSSREFS Cf. A054521, A128407, A112399, A008683. Sequence in context: A143242 A136442 A168030 * A054521 A014240 A014471 Adjacent sequences:  A128428 A128429 A128430 * A128432 A128433 A128434 KEYWORD tabl,sign AUTHOR Gary W. Adamson, Mar 03 2007 STATUS approved

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