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Search: id:A108041
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| A108041 |
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Triangle of numbers {a(n,k), n >= 0, 0<=k<=n} defined by a(0,0)=1, a(n,0)=a(n-1,n-1), a(n,k)=a(n,k-1) + Sum_{i=0..k-1} a(n-1,i). |
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+0
5
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| 1, 1, 2, 2, 3, 7, 7, 9, 19, 42, 42, 49, 100, 210, 443, 443, 485, 977, 2005, 4120, 8473, 8473, 8916, 17874, 36240, 73508, 149131, 302615, 302615, 311088, 622619, 1254196, 2526758, 5090784, 10257191, 20667866, 20667866, 20970481, 41949435, 84210401, 169052379
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