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A223020
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Number of n X 4 0..2 arrays with every row having the same least squares slope fit to a straight line, and every column the same least squares slope fit to a straight line, with a single point array taken as having zero slope.
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1
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81, 115, 739, 1365, 13997, 35571, 468409, 1445055, 21226859, 73973931, 1148109637, 4289486945, 68628631487, 267714393779, 4363979828661, 17495451002837, 288742958413869, 1179160655695485, 19640515026470277, 81257674712215213
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