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A107866
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Column 0 of triangle A107865.
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1
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1, -1, -1, -7, -77, -1145, -21410, -481683, -12655196, -379998938, -12830421321, -480984691304, -19816691903510, -889846823832596, -43247136243424267, -2261480610502143020, -126596066994553497948, -7553154370244179931495, -478456478496821309024061
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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LINKS
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PROG
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(PARI) {a(n)=(matrix(n+1, n+1, r, c, if(r>=c, binomial((r-1)*(r-2)/2-(c-1)*(c-2)/2+r-c, r-c)))^-1)[n+1, 1]}
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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