A249092 Number of length 7+5 0..n arrays with every six consecutive terms having two times the sum of some two elements equal to the sum of the remaining four

22, 243, 11964, 143925, 805518, 5629189, 23480326, 75209315, 238362040, 614349855, 1375887454, 3011935973, 5922207890, 10720937567, 19147697430, 32000182293, 50821260970, 79809454005, 120332402226, 175018554513

Offset

1,1

Comments

Row 7 of A249085

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

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

Crossrefs

Sequence in context: A249090 A249091 A041930 * A125410 A200206 A252819

Adjacent sequences: A249089 A249090 A249091 * A249093 A249094 A249095

Keyword

nonn

Author

R. H. Hardin, Oct 20 2014

Status

approved