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Search: id:A108074
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| 1, 1, 1, 2, 2, 1, 6, 5, 3, 1, 19, 16, 9, 4, 1, 63, 54, 31, 14, 5, 1, 219, 188, 111, 52, 20, 6, 1, 787, 676, 405, 197, 80, 27, 7, 1, 2897, 2492, 1508, 752, 320, 116, 35, 8, 1, 10869, 9361, 5712, 2900, 1276, 489, 161, 44, 9, 1, 41414, 35702, 21933, 11296, 5095, 2034, 714
(list; table; graph; listen)
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OFFSET
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0,4
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COMMENT
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A convolution triangle of numbers based on A071969 . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Sep 15 2005
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FORMULA
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T(0, 0) = 1; T(n, k) = 0 if k<0 or if k>n; T(n, k) = Sum_{j, j>=0} T(n-1, k-1+j) + Sum_{j, j>=0} T(n-1, k+2+j) . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Sep 15 2005
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EXAMPLE
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1; 1,1; 2,2,1; 6,5,3,1; 19,16,9,4,1; ...
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CROSSREFS
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Sequence in context: A130469 A106381 A064784 this_sequence A127743 A125278 A134558
Adjacent sequences: A108071 A108072 A108073 this_sequence A108075 A108076 A108077
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KEYWORD
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nonn,tabl,easy
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AUTHOR
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njas, Jun 05 2005
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EXTENSIONS
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More terms from Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Sep 15 2005
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