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 A128207 Number triangle T(n,k)=(-1)^(n-k)*[k<=n]*Product{i=1..n,Sum{j=0..i-1,F(j-1)}/Product{i=1..k,Sum{j=0..i-1,F(j-1)}}. 1
 1, -1, 1, 1, -1, 1, -2, 2, -2, 1, 6, -6, 6, -3, 1, -30, 30, -30, 15, -5, 1, 240, -240, 240, -120, 40, -8, 1, -3120, 3120, -3120, 1560, -520, 104, -13, 1, 65520, -65520, 65520, -32760, 10920 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,7 COMMENTS First two subdiagonals are -A000045(n+1) and A001654(n+1). Inverse is A128206. LINKS EXAMPLE Triangle begins 1, -1, 1, 1, -1, 1, -2, 2, -2, 1, 6, -6, 6, -3, 1, -30, 30, -30, 15, -5, 1, 240, -240, 240, -120, 40, -8, 1, -3120, 3120, -3120, 1560, -520, 104, -13, 1, 65520, -65520, 65520, -32760, 10920, -2184, 273, -21, 1 CROSSREFS Sequence in context: A255399 A181830 A086612 * A340740 A306707 A180958 Adjacent sequences:  A128204 A128205 A128206 * A128208 A128209 A128210 KEYWORD easy,sign,tabl AUTHOR Paul Barry, Feb 19 2007 STATUS approved

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Last modified April 17 08:34 EDT 2021. Contains 343064 sequences. (Running on oeis4.)