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Search: id:A098173
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| A098173 |
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Triangle T(n,k) with diagonals T(n,n-k)=Binomial(n,4k). |
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+0
2
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| 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 0, 15, 1, 0, 0, 0, 0, 0, 0, 35, 1, 0, 0, 0, 0, 0, 0, 1, 70, 1, 0, 0, 0, 0, 0, 0, 0, 9, 126, 1, 0, 0, 0, 0, 0, 0, 0, 0, 45, 210, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 165, 330, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 495, 495, 1, 0, 0, 0, 0, 0, 0
(list; table; graph; listen)
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OFFSET
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0,20
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COMMENT
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Row sums are A038503.
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FORMULA
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Triangle T(n, k)=Binomial(n, 4(n-k)).
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EXAMPLE
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Rows begin {1}, {0,1}, {0,0,1}, {0,0,0,1}, {0,0,0,1,1}, {0,0,0,0,5,1},...
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CROSSREFS
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Cf. A098158, A098172.
Sequence in context: A027641 A164555 A129205 this_sequence A058177 A079508 A007912
Adjacent sequences: A098170 A098171 A098172 this_sequence A098174 A098175 A098176
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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), Aug 30 2004
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