|
|
A255711
|
|
Number of length n 1..(3+2) arrays with no leading partial sum equal to a prime and no consecutive values equal
|
|
1
|
|
|
2, 4, 10, 21, 47, 102, 256, 754, 2169, 5999, 17237, 49510, 132956, 339522, 900236, 2620855, 8077245, 24619352, 71983144, 205409149, 584195761, 1647027286, 4572955010, 12705583667, 36182897964, 106766407391, 326242477740
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..4....4....1....1....1....1....1....1....4....4....4....4....4....1....1....1
..2....5....3....5....5....3....3....5....2....2....5....5....5....5....3....3
..4....1....4....4....3....4....2....4....3....4....1....3....3....3....5....5
..2....2....1....2....5....2....4....5....1....5....4....2....4....1....1....3
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|