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A131283
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a(n) is the number of binary strings of length n such that there exist 3 or more ones in a subsequence of length 5 or less.
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10
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0, 0, 1, 5, 16, 38, 85, 185, 396, 838, 1748, 3609, 7400, 15097, 30681, 62154, 125588, 253246, 509850, 1025153, 2059159, 4132679, 8288643, 16615051, 33291367, 66682128, 133525499, 267312553, 535049374, 1070786975, 2142690382
(list; graph; refs; listen; history; internal format)
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