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 A158902 Triangle read by rows: the matrix product A051731 * A158821. 4
 1, 2, 1, 3, 0, 1, 5, 1, 0, 1, 5, 0, 0, 0, 1, 9, 1, 1, 0, 0, 1, 7, 0, 0, 0, 0, 0, 1, 12, 1, 0, 1, 0, 0, 0, 1, 11, 0, 1, 0, 0, 0, 0, 0, 1, 15, 1, 0, 0, 1, 0, 0, 0, 0, 1, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 23, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA T(n,n) = 1. T(n,1) = A158901(n). EXAMPLE First few rows of the triangle = 1; 2, 1; 3, 0, 1; 5, 1, 0, 1; 5, 0, 0, 0, 1; 9, 1, 1, 0, 0, 1; 7, 0, 0, 0, 0, 0, 1; 12, 1, 0, 1, 0, 0, 0, 1 11, 0, 1, 0, 0, 0, 0, 0, 1; 15, 1, 0, 0, 1, 0, 0, 0, 0, 1; 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1; 23, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1; 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1; 21, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1; ... MAPLE A158902 := proc(n, k)     add( A051731(n, j)*A158821(j-1, k-1), j=k..n) ; end proc: seq(seq(A158902(n, k), k=1..n), n=1..12) ; # R. J. Mathar, Jan 08 2015 CROSSREFS Cf. A158821, A051731, A158901, A000203 (row sums). Sequence in context: A113287 A195665 A096798 * A137587 A168021 A137639 Adjacent sequences:  A158899 A158900 A158901 * A158903 A158904 A158905 KEYWORD nonn,tabl AUTHOR Gary W. Adamson and Mats Granvik, Mar 29 2009 EXTENSIONS Wrong A-number in definition corrected by Robert Israel, Jan 08 2015 STATUS approved

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Last modified June 20 08:06 EDT 2019. Contains 324229 sequences. (Running on oeis4.)