A184696 Number of strings of numbers x(i=1..n) in 0..2 with sum i*x(i) equal to n*2.

1, 2, 3, 7, 12, 21, 35, 58, 91, 142, 215, 322, 472, 685, 979, 1385, 1936, 2684, 3685, 5023, 6790, 9119, 12163, 16130, 21264, 27887, 36383, 47249, 61076, 78621, 100787, 128714, 163766, 207643, 262385, 330506, 415023, 519630, 648751, 807768, 1003113, 1242574

Offset: 1

Author

R. H. Hardin Jan 20 2011

Keywords

• nonn

Comments

Column 2 of A184703

Examples

			All solutions for n=4
..0....1....0....0....2....2....1
..2....0....0....1....1....0....2
..0....1....0....2....0....2....1
..1....1....2....0....1....0....0
		

Links

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