

A252955


Number of (n+2)X(2+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order


1



119, 120, 185, 337, 596, 1186, 2279, 4165, 8552, 16744, 31079, 64381, 127298, 237724, 494963, 983227, 1846154, 3851596, 7687829, 14482087, 30290270, 60671074, 114655493, 240248527, 483021992, 914633350, 1921066049, 3874689085
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OFFSET

1,1


COMMENTS

Column 2 of A252961


LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210


FORMULA

Empirical: a(n) = 5*a(n1) 6*a(n2) +8*a(n3) 55*a(n4) +75*a(n5) +71*a(n6) 85*a(n7) 42*a(n8) 600*a(n9) +1575*a(n10) 1323*a(n11) +378*a(n12) for n>14


EXAMPLE

Some solutions for n=2
..0..0..1..1....0..1..1..2....0..1..1..2....0..1..1..2....0..1..1..2
..2..2..0..0....1..0..1..0....3..3..4..4....3..0..0..4....3..0..0..4
..3..3..2..2....3..3..1..3....4..0..0..1....4..3..3..1....2..3..3..1
..4..4..3..4....2..2..1..1....1..1..3..3....2..1..1..3....1..2..2..0


CROSSREFS

Sequence in context: A013683 A071843 A234691 * A171697 A172017 A049048
Adjacent sequences: A252952 A252953 A252954 * A252956 A252957 A252958


KEYWORD

nonn


AUTHOR

R. H. Hardin, Dec 25 2014


STATUS

approved



