A211911
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, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-2.
Original entry on oeis.org
0, 1, 6, 25, 70, 156, 301, 526, 855, 1315, 1936, 2751, 3796, 5110, 6735, 8716, 11101, 13941, 17290, 21205, 25746, 30976, 36961, 43770, 51475, 60151, 69876, 80731, 92800, 106170, 120931, 137176, 155001, 174505, 195790, 218961, 244126, 271396, 300885
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....3.4.5....3.4.5....3.4.5....3.4.1....3.4.5
..0.6.7.8..6.7.8.1..1.6.7.8..6.7.3.8..6.7.8.7..6.1.7.8..5.6.7.8..6.7.8.3
A211912
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, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-3.
Original entry on oeis.org
0, 1, 10, 214, 1946, 10431, 40561, 127275, 342434, 820396, 1794811, 3649471, 6986365, 12714404, 22162596, 37221766, 60519231, 95631155, 147337624, 221925796, 327546796, 474632341, 676377395
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
..3.4.1....3.4.5....3.4.5....3.4.5....3.4.1....3.4.5....3.4.5....3.4.5
..2.5.6.7..6.0.1.7..6.1.7.2..6.2.7.3..5.6.7.2..6.7.0.8..5.6.3.7..0.1.6.7
A211913
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, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-4.
Original entry on oeis.org
0, 0, 10, 802, 27963, 394117, 3243531, 18826250, 85484512, 323341343, 1061434357, 3110902786, 8308425940
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
..0.3.4....3.4.5....3.0.4....3.4.0....3.4.5....0.3.4....0.3.4....3.4.5
..5.6.0.5..0.1.6.7..4.5.6.0..5.6.7.6..2.1.6.3..5.2.6.7..4.5.6.1..1.6.2.1
A211914
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, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-5.
Original entry on oeis.org
0, 0, 10, 1492, 227388, 9345480, 172044141, 1908272916, 14931819099
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
..3.0.4....3.4.0....3.4.3....3.4.5....0.3.4....0.3.1....3.4.0....3.0.4
..1.5.3.1..5.1.6.4..5.6.5.1..0.6.0.6..5.6.5.2..2.4.0.5..1.5.6.5..1.2.1.5
A211915
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, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-6.
Original entry on oeis.org
0, 0, 10, 1732, 1085432, 146208485, 6410611003, 140836842878
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
..3.4.1....3.0.3....0.3.4....3.4.0....3.4.5....3.0.4....0.3.1....3.0.4
..1.0.5.3..2.4.5.6..5.1.6.3..5.1.5.3..2.1.0.3..5.2.6.0..2.4.2.4..4.5.3.6
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