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Search: id:A101564
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| A101564 |
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a(n)=sum{k=0..n, (-1)^A010060(n-k)*if(mod(n+1,k+1)=0,1,0)*10^k}. |
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| 1, 9, 99, 991, 9999, 100091, 1000001, 9999009, 100000099, 1000009991, 10000000001, 100000099109, 1000000000001, 9999999000009, 100000000010099, 999999990000991, 9999999999999999, 100000000100100091
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