A200151 Number of 0..5 arrays x(0..n-1) of n elements with zero n-1st difference

1, 6, 18, 66, 202, 730, 2036, 7488, 19262, 62772, 190408, 1077600, 2185196, 12081408, 21927244, 52980770, 148851716, 1353060240, 2585159746, 16942421808, 28793485330, 51092435876, 106822624510, 1565885020128

Offset

1,2

Comments

Column 5 of A200154

Links

Table of n, a(n) for n=1..24.

Example

Some solutions for n=6
..4....3....3....0....4....1....5....3....0....5....5....5....5....5....4....5
..4....5....3....2....4....3....3....1....1....0....3....4....1....0....0....4
..1....0....4....1....0....4....3....2....3....2....4....2....2....3....3....5
..1....0....3....1....0....3....3....2....2....4....5....1....3....4....4....5
..4....5....1....3....4....1....3....1....0....4....5....1....3....2....2....4
..4....3....3....5....4....1....5....3....5....5....5....0....5....5....4....5

Crossrefs

Sequence in context: A144706 A074427 A034751 * A000623 A304941 A129369

Adjacent sequences: A200148 A200149 A200150 * A200152 A200153 A200154

Keyword

nonn

Author

R. H. Hardin Nov 13 2011

Status

approved