A247931 Number of length 4+4 0..n arrays with some disjoint pairs in every consecutive five terms having the same sum

256, 3649, 31092, 157589, 552708, 1551533, 3785236, 8185797, 16336592, 29964505, 51882716, 85160905, 134184772, 203205957, 298757712, 427405305, 597735952, 817776021, 1099449280, 1455028945, 1897411468, 2442220549, 3107178892

Offset

1,1

Comments

Row 4 of A247927

Links

R. H. Hardin, Table of n, a(n) for n = 1..70

Example

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

Crossrefs

Sequence in context: A185923 A185919 A259320 * A183781 A186200 A186197

Adjacent sequences: A247928 A247929 A247930 * A247932 A247933 A247934

Keyword

nonn

Author

R. H. Hardin, Sep 26 2014

Status

approved