login
A269825
Number of nX4 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.
1
240, 39784, 3200604, 240637408, 16644595392, 1109236460528, 71730749075588, 4544255355000752, 283289815771686692, 17440137572474977008, 1062799029214265825864, 64226079502012687928352
OFFSET
1,1
COMMENTS
Column 4 of A269829.
FORMULA
Empirical recurrence of order 48 (see link above)
EXAMPLE
Some solutions for n=2
..3..4..1..1. .1..2..3..0. .2..4..4..2. .4..4..0..2. .0..1..1..4
..4..1..1..4. .2..0..3..2. .3..3..4..2. .4..1..1..1. .0..2..2..1
CROSSREFS
Cf. A269829.
Sequence in context: A110163 A323981 A258082 * A232843 A289636 A001943
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 05 2016
STATUS
approved