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A113280
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A symmetrical triangle of coefficients: t(n,m)=(n - m)*(n - m + 2)*m*(m + 2) + 1.
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0
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1, 1, 1, 1, 10, 1, 1, 25, 25, 1, 1, 46, 65, 46, 1, 1, 73, 121, 121, 73, 1, 1, 106, 193, 226, 193, 106, 1, 1, 145, 281, 361, 361, 281, 145, 1, 1, 190, 385, 526, 577, 526, 385, 190, 1, 1, 241, 505, 721, 841, 841, 721, 505, 241, 1, 1, 298, 641, 946, 1153, 1226, 1153, 946
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OFFSET
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1,5
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COMMENTS
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Row sums are:
{1, 2, 12, 52, 159, 390, 826, 1576, 2781, 4618, 7304}.
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LINKS
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FORMULA
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t(n,m)=(n - m)*(n - m + 2)*m*(m + 2) + 1.
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EXAMPLE
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{1},
{1, 1},
{1, 10, 1},
{1, 25, 25, 1},
{1, 46, 65, 46, 1},
{1, 73, 121, 121, 73, 1},
{1, 106, 193, 226, 193, 106, 1},
{1, 145, 281, 361, 361, 281, 145, 1},
{1, 190, 385, 526, 577, 526, 385, 190, 1},
{1, 241, 505, 721, 841, 841, 721, 505, 241, 1},
{1, 298, 641, 946, 1153, 1226, 1153, 946, 641, 298, 1}
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MATHEMATICA
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Clear[t, n, m] t[n_, m_] = (n - m)*(n - m + 2)*m*(m + 2) + 1; Table[Table[t[n, m], {m, 0, n}], {n, 0, 10}]; Flatten[%]
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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