A201955
Number of zero-sum n X 2 -3..3 arrays with every element unequal to at most two horizontal and vertical neighbors.
Original entry on oeis.org
7, 231, 1587, 17903, 194633, 2232183, 25952953, 305979795, 3640250461, 43624267941, 525774918227, 6366440653727, 77388201173481, 943784967491137, 11542145313593503, 141498452574240619, 1738344524754583621
Offset: 1
Some solutions for n=4
..2..3...-3.-3...-2.-3...-2..3...-2..1....2.-3....2.-3....2..0...-3.-1....1.-2
..0..0....2..2....1..1....0..0...-2..0....1..1....3.-3....0.-1....3..0....0..0
.-2.-2...-1.-1....2..2....1..1....2..0....0..0....3..0....0.-1....3..0....0..0
.-2..1....3..1....0.-1...-1.-2....2.-1...-1..0...-2..0....3.-3...-2..0....3.-2
A201956
Number of zero-sum nX3 -3..3 arrays with every element unequal to at most two horizontal and vertical neighbors.
Original entry on oeis.org
37, 1587, 17091, 303955, 4735345, 85454789, 1489376611, 27222524599, 493561989579, 9124430335331, 168519041238653, 3142665027511853, 58661584782394781, 1101133968614654601, 20697996312691430763
Offset: 1
Some solutions for n=3
..1.-2.-2....2..2..2....1..0..1...-1..1..1....2..3..3....2..2.-1....0.-2..3
..1..1.-2....0..0..0...-2..0..1...-1..2..2...-3.-3..3....2..0..0....1.-2..3
.-1..1..3....0.-3.-3...-2..0..1...-3..2.-3...-1.-3.-1...-2..0.-3....1.-2.-2
A201957
Number of zero-sum nX4 -3..3 arrays with every element unequal to at most two horizontal and vertical neighbors.
Original entry on oeis.org
231, 17903, 303955, 9654533, 300895245, 10356370455, 360008261031
Offset: 1
Some solutions for n=2
.-1.-2.-2..3....2..1.-3.-3...-3.-3..2..2...-3..0..0..0....3..0.-2.-1
.-2.-2..3..3....3..1..1.-2....1.-3..2..2....0..3..3.-3...-1..0.-2..3
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