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A026520
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a(n) = T(n,n), T given by A026519. Also a(n) = number of integer strings s(0),...,s(n), counted by T, such that s(n)=0.
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1
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1, 1, 2, 4, 8, 20, 38, 104, 196, 556, 1052, 3032, 5774, 16778, 32146, 93872, 180772, 529684, 1024256, 3008864, 5837908, 17184188, 33433996, 98577712, 192239854, 567591142, 1109049320, 3278348608, 6416509142, 18986482250
(list; graph; refs; listen; history; internal format)
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