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Search: id:A114162
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| A114162 |
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C(n,k)*Floor((n-k)/2)!. |
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+0
1
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| 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 2, 4, 6, 4, 1, 2, 10, 10, 10, 5, 1, 6, 12, 30, 20, 15, 6, 1, 6, 42, 42, 70, 35, 21, 7, 1, 24, 48, 168, 112, 140, 56, 28, 8, 1, 24, 216, 216, 504, 252, 252, 84, 36, 9, 1, 120, 240, 1080, 720, 1260, 504, 420, 120, 45, 10, 1
(list; table; graph; listen)
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OFFSET
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0,5
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COMMENT
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Row sums are A081124.
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FORMULA
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T(n, k)=if(k<=n, C(n, k)floor((n-k)/2)!, 0)
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EXAMPLE
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Triangle begins
1;
1, 1;
1, 2, 1;
1, 3, 3, 1;
2, 4, 6, 4, 1;
2, 10, 10, 10, 5, 1;
6, 12, 30, 20, 15, 6, 1;
6, 42, 42, 70, 35, 21, 7, 1;
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CROSSREFS
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Sequence in context: A067924 A056670 A030189 this_sequence A162981 A029264 A124054
Adjacent sequences: A114159 A114160 A114161 this_sequence A114163 A114164 A114165
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KEYWORD
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easy,nonn,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Nov 14 2005
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