A250172 Number of length 7+1 0..n arrays with the sum of adjacent differences multiplied by some arrangement of +-1 equal to zero

128, 3517, 32032, 195927, 810964, 2810751, 7989940, 20567199, 46931176, 100480363, 198506588, 375153177, 669200436, 1155420975, 1910171088, 3080038929, 4801129076, 7337318733, 10913397192, 15974820909, 22870564032

Offset

1,1

Comments

Row 7 of A250167

Links

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

Example

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

Crossrefs

Sequence in context: A269001 A191899 A191495 * A188303 A283813 A239441

Adjacent sequences: A250169 A250170 A250171 * A250173 A250174 A250175

Keyword

nonn

Author

R. H. Hardin, Nov 13 2014

Status

approved