A243382 Number of length n+3 0..n arrays with no four elements in a row with pattern abba (with a!=b) and new values 0..n introduced in 0..n order

7, 35, 158, 715, 3406, 17366, 94907, 553807, 3433490, 22512257, 155472029, 1126989053, 8548807676, 67679513141, 557899676487, 4778535406628, 42448208962613, 390404810629273, 3711893438414835, 36432789329793687

Offset

1,1

Comments

Diagonal of A243389

Links

R. H. Hardin, Table of n, a(n) for n = 1..62

Example

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

Crossrefs

Sequence in context: A171477 A265612 A005003 * A242577 A163348 A291237

Adjacent sequences: A243379 A243380 A243381 * A243383 A243384 A243385

Keyword

nonn

Author

R. H. Hardin, Jun 04 2014

Status

approved