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Search: id:A026521
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| A026521 |
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a(n) = T(n,n-1), T given by A026519. Also a(n) = number of integer strings s(0),...,s(n), counted by T, such that s(n)=1. |
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| 1, 1, 4, 6, 19, 33, 98, 180, 526, 990, 2887, 5502, 16073, 30863, 90386, 174456, 512128, 992304, 2918954, 5673140, 16716998, 32571858, 96119927, 187675644, 554524660, 1084649644, 3208254571, 6284986554, 18607536319, 36501029265
(list; graph; listen)
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