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 A223022 T(n,k)=Number of nXk 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 4
 3, 9, 9, 27, 19, 27, 81, 45, 45, 81, 243, 115, 309, 115, 243, 729, 309, 739, 739, 309, 729, 2187, 859, 8355, 1365, 8355, 859, 2187, 6561, 2445, 25953, 13997, 13997, 25953, 2445, 6561, 19683, 7075, 347991, 35571, 878487, 35571, 347991, 7075, 19683, 59049, 20709 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......3......9.......27.......81.......243.......729......2187......6561 ......9.....19.......45......115.......309.......859......2445......7075 .....27.....45......309......739......8355.....25953....347991...1229117 .....81....115......739.....1365.....13997.....35571....468409...1445055 ....243....309.....8355....13997....878487...2091169.212538795.603347801 ....729....859....25953....35571...2091169...3659139.405114337 ...2187...2445...347991...468409.212538795.405114337 ...6561...7075..1229117..1445055.603347801 ..19683..20709.18018549.21226859 ..59049..61099.67909529 .177147.181245 .531441 LINKS R. H. Hardin, Table of n, a(n) for n = 1..83 EXAMPLE Some solutions for n=3 k=4 ..1..0..0..1....1..1..1..1....0..1..2..0....1..1..2..1....2..2..1..1 ..0..0..0..0....0..2..2..0....0..2..0..1....1..0..1..1....1..1..0..0 ..2..1..1..2....0..0..0..0....0..1..2..0....0..0..1..0....2..2..1..1 CROSSREFS Column 1 is A000244 Column 2 is A183624(n-1) Sequence in context: A207317 A206700 A162349 * A072404 A222996 A268026 Adjacent sequences:  A223019 A223020 A223021 * A223023 A223024 A223025 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 11 2013 STATUS approved

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Last modified October 18 20:04 EDT 2019. Contains 328197 sequences. (Running on oeis4.)