A190047 Number of nondecreasing arrangements of 10 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, 18, 30, 87, 69, 203, 100, 349, 200, 409, 189, 754, 258, 545, 540, 927, 267, 1109, 341, 1272, 780, 849, 393, 2196, 578, 1100, 896, 1694, 578, 2386, 565, 2104, 1122, 1371, 1113, 3273, 672, 1512, 1357, 3363, 696, 3175, 724, 2587, 2242, 1737, 883, 4977, 1100

Offset

1,1

Comments

Row 8 of A190041.

Links

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

Example

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

Crossrefs

Cf. A190041.

Sequence in context: A141426 A101844 A193598 * A166259 A073213 A086490

Adjacent sequences: A190044 A190045 A190046 * A190048 A190049 A190050

Keyword

nonn

Author

R. H. Hardin, May 04 2011

Status

approved