A212788 Half the number of 0..n arrays of length 9 with second differences nonzero.

55, 2385, 54793, 465336, 2780392, 12025596, 43129809, 129984123, 351172313, 852813984, 1922215028, 4035429570, 8030912421, 15179187087, 27570308959, 48164526258, 81559118508, 133992393064, 214705512971, 335752649443

Offset

1,1

Comments

Row 7 of A212782.

Links

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

Example

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

Crossrefs

Cf. A212782.

Sequence in context: A012048 A215860 A020536 * A131557 A231853 A119166

Adjacent sequences: A212785 A212786 A212787 * A212789 A212790 A212791

Keyword

nonn

Author

R. H. Hardin, May 27 2012

Status

approved