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 A187048 Number of 4-step one or two space at a time bishop's tours on an n X n board summed over all starting positions 0
 0, 0, 24, 272, 1084, 2660, 5032, 8164, 12056, 16708, 22120, 28292, 35224, 42916, 51368, 60580, 70552, 81284, 92776, 105028, 118040, 131812, 146344, 161636, 177688, 194500, 212072, 230404, 249496, 269348, 289960, 311332, 333464, 356356, 380008 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Row 4 of A187046 LINKS FORMULA Empirical: a(n) = 380*n^2 - 2568*n + 4388 for n>5 EXAMPLE Some solutions for 4X4 ..0..0..4..0....0..0..0..0....0..0..1..0....0..0..3..0....0..1..0..0 ..0..0..0..3....4..0..1..0....0..3..0..0....0..2..0..0....0..0..3..0 ..0..0..2..0....0..0..0..2....2..0..0..0....4..0..0..0....0..0..0..2 ..0..0..0..1....0..0..3..0....0..0..0..4....0..0..0..1....4..0..0..0 CROSSREFS Sequence in context: A022065 A125412 A270846 * A000915 A006665 A010940 Adjacent sequences:  A187045 A187046 A187047 * A187049 A187050 A187051 KEYWORD nonn AUTHOR R. H. Hardin Mar 02 2011 STATUS approved

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Last modified December 1 20:41 EST 2021. Contains 349435 sequences. (Running on oeis4.)