A211905
Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-2.
Original entry on oeis.org
0, 2, 10, 34, 86, 181, 337, 575, 919, 1396, 2036, 2872, 3940, 5279, 6931, 8941, 11357, 14230, 17614, 21566, 26146, 31417, 37445, 44299, 52051, 60776, 70552, 81460, 93584, 107011, 121831, 138137, 156025, 175594, 196946, 220186, 245422, 272765, 302329
Offset: 1
Some solutions for n=4:
..0........0........0........0........0........0........0........0
..1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2
..3.4.5....3.4.5....3.0.4....3.4.5....3.4.5....3.4.3....3.4.5....3.4.5
..6.0.7.8..6.7.8.7..5.6.7.8..6.7.4.8..6.7.8.4..5.6.7.8..6.1.7.8..6.7.0.8
A211906
Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-3.
Original entry on oeis.org
0, 2, 30, 418, 3006, 14201, 51157, 152650, 396538, 926011, 1987151, 3980637, 7530745, 13575108, 23479016, 39178351, 63355567, 99653440, 152931628, 229571396, 337834176, 488279947, 694251735
Offset: 1
Some solutions for n=4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2
..3.4.5....3.4.5....3.4.5....3.4.2....3.4.5....3.4.5....2.3.4....3.4.5
..6.7.0.8..6.0.1.7..6.3.7.8..5.6.7.3..1.5.6.7..6.2.7.5..5.6.0.7..6.2.6.7
A211907
Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-4.
Original entry on oeis.org
0, 0, 41, 2385, 55822, 637721, 4639742, 24871596, 106911695, 388681117, 1238600816, 3548005682, 9306274551
Offset: 1
Some solutions for n=4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.0......1.2......1.2......1.0......1.2......1.0
..3.4.5....0.3.2....2.3.4....3.4.2....3.4.3....2.3.4....3.1.4....2.1.3
..6.3.0.6..4.5.3.6..1.0.5.6..0.3.5.6..4.5.2.6..5.2.6.5..5.6.3.4..1.4.5.6
A211908
Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-5.
Original entry on oeis.org
0, 0, 42, 6927, 605769, 18239150, 281228042, 2788818593, 20221781939
Offset: 1
Some solutions for n=4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2
..3.4.5....3.1.4....2.0.3....3.4.1....0.3.4....3.4.3....3.4.5....2.3.4
..4.5.6.2..5.6.1.4..4.1.5.3..2.5.6.4..1.5.6.3..5.3.0.4..5.1.3.4..3.4.5.6
A211909
Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-6.
Original entry on oeis.org
0, 0, 42, 11296, 3997836, 350026718, 12075054829, 228741733963
Offset: 1
Some solutions for n=4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.2......1.2......1.2......1.0......1.2......1.2
..2.3.2....0.3.0....0.3.4....3.4.3....2.1.3....2.3.2....2.3.2....3.0.4
..4.1.4.0..4.5.2.6..3.0.2.0..5.0.5.3..4.0.4.3..4.2.0.1..3.4.3.1..4.5.2.0
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