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A167684
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Triangle read by rows given by [2,-1,1,-2,0,0,0,0,0,0,0,...] DELTA [1,0,1,-1,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938.
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0
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1, 2, 1, 2, 3, 1, 0, 2, 3, 1, 0, 0, 2, 3, 1, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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T(n,k) = T(n-1,k-1) for n>2, T(0,0) = T(1,1) = T(2,2) = 1, T(1,0) = T(2,0) = 2, T(2,1) = 3, T(n,k) = 0 if k<0 or if k>n. - Philippe Deléham, Nov 09 2013
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EXAMPLE
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Triangle begins :
1 ;
2,1 ;
2,3,1 ;
0,2,3,1 ;
0,0,2,3,1 ;
0,0,0,2,3,1 ;
0,0,0,0,2,3,1 ; ...
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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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