A190046 Number of nondecreasing arrangements of 9 numbers in 0..n with the last equal to n and each after the second equal to the sum of one or two of the preceding three.

2, 16, 26, 69, 57, 151, 80, 246, 144, 284, 138, 492, 178, 372, 364, 583, 195, 717, 239, 799, 520, 570, 288, 1314, 399, 716, 601, 1079, 392, 1441, 415, 1278, 751, 909, 723, 1938, 474, 1029, 869, 1981, 515, 1916, 536, 1639, 1380, 1195, 611, 2847, 743, 1776

Offset

1,1

Comments

Row 7 of A190041

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

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

Crossrefs

Sequence in context: A394360 A344989 A276069 * A067566 A067555 A108705

Adjacent sequences: A190043 A190044 A190045 * A190047 A190048 A190049

Keyword

nonn

Author

R. H. Hardin, May 04 2011

Status

approved