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 A291971 Triangle read by rows: T(n,k) = 3 * T(n-k,k-1) + T(n-k,k) with T(0,0) = 1 for 0 <= k <= A003056(n). 3
 1, 0, 3, 0, 3, 0, 3, 9, 0, 3, 9, 0, 3, 18, 0, 3, 18, 27, 0, 3, 27, 27, 0, 3, 27, 54, 0, 3, 36, 81, 0, 3, 36, 108, 81, 0, 3, 45, 135, 81, 0, 3, 45, 189, 162, 0, 3, 54, 216, 243, 0, 3, 54, 270, 405, 0, 3, 63, 324, 486, 243, 0, 3, 63, 378, 729, 243, 0, 3, 72, 432, 891 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Seiichi Manyama, Rows n = 0..481, flattened EXAMPLE First few rows are:   1;   0, 3;   0, 3;   0, 3,  9;   0, 3,  9;   0, 3, 18;   0, 3, 18,  27;   0, 3, 27,  27;   0, 3, 27,  54;   0, 3, 36,  81;   0, 3, 36, 108, 81. CROSSREFS Row sums give A032308. Columns 0-1 give A000007, A010701. Cf. A008289 (m=1), A291970 (m=2), this sequence (m=3). Sequence in context: A262281 A297871 A292130 * A240923 A272727 A333791 Adjacent sequences:  A291968 A291969 A291970 * A291972 A291973 A291974 KEYWORD nonn,tabf,look AUTHOR Seiichi Manyama, Sep 07 2017 STATUS approved

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Last modified April 20 01:36 EDT 2021. Contains 343117 sequences. (Running on oeis4.)