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 A187457 T(n,k)=Number of (n+1)X(n+1) 0..k arrays with the array of 2X2 subblock determinants symmetric 5
 16, 81, 264, 256, 5175, 10776, 625, 38464, 1293651, 1011136, 1296, 187525, 34166592, 983320335, 229028648, 2401, 628992, 450657775, 99952737952, 2806943351103, 121525356464, 4096, 1938979, 3553508880, 3764498129375, 1694940245504992 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........16............81..............256................625...........1296 .......264..........5175............38464.............187525.........628992 .....10776.......1293651.........34166592..........450657775.....3553508880 ...1011136.....983320335......99952737952......3764498129375.63480204115632 .229028648.2806943351103.1694940245504992.268361727217027575 LINKS R. H. Hardin, Table of n, a(n) for n = 1..40 EXAMPLE Some k=3 solutions for 4X4 ..0..0..0..1....0..0..0..0....0..0..0..3....0..0..0..1....0..0..0..1 ..2..0..0..0....1..0..0..0....1..0..0..0....1..0..0..0....2..0..0..3 ..0..0..2..3....0..0..1..3....0..0..0..2....0..0..0..2....0..0..0..3 ..3..0..1..1....2..0..2..1....1..0..1..2....1..2..2..1....2..2..2..2 CROSSREFS Sequence in context: A075578 A113316 A113317 * A056118 A351602 A134606 Adjacent sequences: A187454 A187455 A187456 * A187458 A187459 A187460 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 10 2011 STATUS approved

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Last modified February 26 02:18 EST 2024. Contains 370335 sequences. (Running on oeis4.)