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 A187857 T(n,k)=Number of n-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on a kXk board summed over all starting positions 9
 1, 4, 0, 9, 5, 0, 16, 27, 2, 0, 25, 65, 81, 0, 0, 36, 119, 254, 216, 0, 0, 49, 189, 578, 968, 486, 0, 0, 64, 275, 1030, 2754, 3320, 846, 0, 0, 81, 377, 1610, 5428, 11986, 9932, 1206, 0, 0, 100, 495, 2318, 9237, 26836, 47962, 26584, 1008, 0, 0, 121, 629, 3154, 14040 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts .1.4....9.....16......25.......36........49.......64.......81.....100.....121 .0.5...27.....65.....119......189.......275......377......495.....629.....779 .0.2...81....254.....578.....1030......1610.....2318.....3154....4118....5210 .0.0..216....968....2754.....5428......9237....14040....19837...26628...34413 .0.0..486...3320...11986....26836.....50378....81124...120051..166504..220483 .0.0..846...9932...47962...126397....262409...452766...707541.1017934.1387600 .0.0.1206..26584..180750...568870...1314428..2456614..4062007.6094090 .0.0.1008..61668..636102..2432312...6343874.12918800.22675997 .0.0..414.124880.2090520..9934272..29607932.65963326 .0.0....0.219008.6387404.38766870.133665550 LINKS R. H. Hardin, Table of n, a(n) for n = 1..130 FORMULA Empirical: T(1,k) = k^2 Empirical: T(2,k) = 8*k^2 - 18*k + 9 for k>1 Empirical: T(3,k) = 64*k^2 - 252*k + 238 for k>3 Empirical: T(4,k) = 497*k^2 - 2652*k + 3448 for k>5 Empirical: T(5,k) = 3763*k^2 - 25044*k + 40644 for k>7 Empirical: T(6,k) = 28294*k^2 - 224508*k + 433614 for k>9 Empirical: T(7,k) = 211612*k^2 - 1941340*k + 4328678 for k>11 Empirical: T(8,k) = 1575830*k^2 - 16367550*k + 41250447 for k>13 Empirical: T(9,k) = 11710007*k^2 - 135575032*k + 380311550 for k>15 Empirical: T(10,k) = 86897560*k^2 - 1108193530*k + 3420011978 for k>17 EXAMPLE Some n=4 solutions for 4X4 ..0..0..1..0....4..0..0..0....0..0..0..0....0..3..0..4....0..0..0..0 ..0..3..0..0....0..3..0..0....0..2..1..0....0..0..2..1....3..2..0..0 ..0..0..2..0....0..0..2..0....0..4..0..0....0..0..0..0....0..1..0..0 ..0..0..0..4....0..0..0..1....0..3..0..0....0..0..0..0....0..0..4..0 CROSSREFS Row 2 is A181890(n-2) Sequence in context: A035102 A242015 A187507 * A215499 A190262 A187586 Adjacent sequences: A187854 A187855 A187856 * A187858 A187859 A187860 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 14 2011 STATUS approved

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Last modified June 15 11:51 EDT 2024. Contains 373407 sequences. (Running on oeis4.)