A249462 Number of length n+4 0..4 arrays with no five consecutive terms having four times any element equal to the sum of the remaining four.

2640, 11260, 48180, 206428, 884728, 3791504, 16249428, 69646680, 298527530, 1279613894, 5484967770, 23510991158, 100778855292, 431985293958, 1851693204500, 7937234390598, 34022755120144, 145837709303458

Offset

1,1

Comments

Column 4 of A249466.

Links

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

Example

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

Crossrefs

Cf. A249466.

Sequence in context: A252579 A253040 A157609 * A257183 A257190 A254983

Adjacent sequences: A249459 A249460 A249461 * A249463 A249464 A249465

Keyword

nonn

Author

R. H. Hardin, Oct 29 2014

Status

approved