|
|
A300962
|
|
Number of n X 4 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
|
|
1
|
|
|
1, 16, 44, 327, 1653, 10135, 60730, 366981, 2221003, 13463050, 81660443, 495408923, 3006220227, 18242218796, 110703174526, 671804474036, 4076912884571, 24741148460838, 150144557785977, 911169851527587, 5529544369303067
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical recurrence of order 75 (see link above).
|
|
EXAMPLE
|
Some solutions for n=5:
..0..0..1..1. .0..0..1..0. .0..0..1..0. .0..0..0..0. .0..0..0..0
..0..0..1..1. .0..1..1..1. .0..1..1..1. .0..1..1..0. .0..1..0..0
..0..0..1..1. .1..1..0..1. .1..0..1..0. .1..1..1..0. .0..0..1..1
..0..1..0..0. .1..0..0..1. .1..1..0..0. .1..1..0..0. .0..1..1..0
..1..1..0..1. .1..1..1..1. .1..0..0..1. .1..0..0..1. .1..1..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|