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Search: id:A015511
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| A015511 |
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a(1)=1, a(n) = sum_{k=1}^{k=n-1} (9^k-1)/8 a(k). |
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| 1, 1, 11, 1012, 830852, 6133349464, 407444538242984, 243599680968409330048, 1310771150941736627904810368, 63477451180042308935531134194562816, 27666523379269090447091129488519658150671616
(list; graph; listen)
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