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 A223824 T(n,k) = Number of n X k 0..3 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope. 6
 4, 4, 4, 16, 4, 16, 22, 16, 16, 22, 112, 22, 256, 22, 112, 172, 112, 484, 484, 112, 172, 1064, 172, 12544, 744, 12544, 172, 1064, 1742, 1064, 29584, 25080, 25080, 29584, 1064, 1742, 11664, 1742, 1132096, 45000, 6121472, 45000, 1132096, 1742, 11664 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......4......4..........16........22............112.........172............1064 ......4......4..........16........22............112.........172............1064 .....16.....16.........256.......484..........12544.......29584.........1132096 .....22.....22.........484.......744..........25080.......45000.........2551604 ....112....112.......12544.....25080........6121472....16748672......9452644096 ....172....172.......29584.....45000.......16748672....32376064.....34078942048 ...1064...1064.....1132096...2551604.....9452644096.34078942048.449530294353728 ...1742...1742.....3034564...4923882....30528090112.73306891648 ..11664..11664...136048896.362643556.25629932950272 ..19976..19976...399040576.760921872 .138640.138640.19221049600 .243802.243802 LINKS R. H. Hardin, Table of n, a(n) for n = 1..97 EXAMPLE Some solutions for n=4, k=4 ..1..2..2..1....2..0..0..2....1..1..1..1....1..1..1..1....2..1..1..2 ..1..0..3..0....0..3..3..0....3..2..2..3....0..3..3..0....3..3..3..3 ..1..0..3..0....0..3..3..0....3..2..2..3....3..3..3..3....0..3..3..0 ..1..2..2..1....2..0..0..2....1..1..1..1....0..1..1..0....3..1..1..3 CROSSREFS Column 2 equals column 1. Sequence in context: A141666 A102127 A201625 * A218056 A218651 A298730 Adjacent sequences: A223821 A223822 A223823 * A223825 A223826 A223827 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 27 2013 STATUS approved

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Last modified March 2 21:56 EST 2024. Contains 370498 sequences. (Running on oeis4.)