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A026573
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a(n)=T(n,n-4), T given by A026568. Also a(n) = number of integer strings s(0),...,s(n) counted by T, such that s(n)=4.
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0
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1, 3, 12, 34, 103, 281, 778, 2072, 5524, 14488, 37918, 98474, 255137, 658351, 1695542, 4356520, 11177720, 28637452, 73294698, 187412326, 478861373, 1222765699, 3120722598, 7961152560, 20302100415, 51757554237
(list; graph; refs; listen; history; internal format)
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