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A156074
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A triangular sequence: t(n,m)=3 + Prime[n + 1] - Prime[m + 1] - Prime[n - m + 1].
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0
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1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 4, 4, 4, 1, 1, 2, 4, 4, 2, 1, 1, 4, 4, 6, 4, 4, 1, 1, 2, 4, 4, 4, 4, 2, 1, 1, 4, 4, 6, 4, 6, 4, 4, 1, 1, 6, 8, 8, 8, 8, 8, 8, 6, 1, 1, 2, 6, 8, 6, 8, 6, 8, 6, 2, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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COMMENTS
| Row sums are:
{1, 2, 4, 6, 14, 14, 24, 22, 34, 62, 54,...}
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FORMULA
| t(n,m)=3 + Prime[n + 1] - Prime[m + 1] - Prime[n - m + 1].
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EXAMPLE
| {1},
{1, 1},
{1, 2, 1},
{1, 2, 2, 1},
{1, 4, 4, 4, 1},
{1, 2, 4, 4, 2, 1},
{1, 4, 4, 6, 4, 4, 1},
{1, 2, 4, 4, 4, 4, 2, 1},
{1, 4, 4, 6, 4, 6, 4, 4, 1},
{1, 6, 8, 8, 8, 8, 8, 8, 6, 1},
{1, 2, 6, 8, 6, 8, 6, 8, 6, 2, 1}
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MATHEMATICA
| t[n_, m_] = 3 + Prime[n + 1] - Prime[m + 1] - Prime[n - m + 1];
Table[Table[t[n, m], {m, 0, n}], {n, 0, 10}];
Flatten[%]
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CROSSREFS
| Sequence in context: A101566 A176653 A174842 * A051287 A176261 A202340
Adjacent sequences: A156071 A156072 A156073 * A156075 A156076 A156077
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KEYWORD
| nonn,tabl,uned
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AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Feb 03 2009
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