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 A127468 Triangle read by rows: matrix product A127466*A054525. 2
 1, 0, 2, -3, 0, 6, 0, -4, 0, 8, -15, 0, 0, 0, 20, 0, -6, 0, 0, 0, 12, -35, 0, 0, 0, 0, 0, 42, 0, -8, 0, -16, 0, 0, 0, 32, -9, 0, -36, 0, 0, 0, 0, 0, 54, 0, -30, 0, 0, 0, 0, 0, 0, 0, 40, -99, 0, 0, 0, 0, 0, 0, 0, 0, 0, 110, 0, 12, 0, -24, 0, -24, 0, 0, 0, 0, 0, 48 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS The row sums are n, the index of the row. LINKS FORMULA T(n,k) = sum_{j=k..n} A127466(n,j) * A054525(j,k). T(n,n) = A002618(n). EXAMPLE First few rows of the triangle are: 1; 0, 2; -3, 0, 6; 0, -4, 0, 8; -15, 0, 0, 0, 20; 0, -6, 0, 0, 0, 12; -35, 0, 0, 0, 0, 0, 42; ... MAPLE A127468 := proc(n, k)     add( A127466(n, j)*A054525(j, k), j=k..n) ; end proc: # R. J. Mathar, Sep 06 2013 CROSSREFS Cf. A127466, A054525, A002618. Sequence in context: A190902 A115562 A343069 * A173720 A173717 A058301 Adjacent sequences:  A127465 A127466 A127467 * A127469 A127470 A127471 KEYWORD tabl,sign AUTHOR Gary W. Adamson, Jan 15 2007 STATUS approved

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Last modified June 15 08:06 EDT 2021. Contains 345048 sequences. (Running on oeis4.)