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A184435
Number of strings of numbers x(i=1..n) in 0..3 with sum i*x(i)^2 equal to n*9
1
1, 1, 2, 5, 19, 51, 130, 359, 946, 2333, 5818, 14088, 33135, 76611, 173464, 384457, 837012, 1790715, 3766901, 7802712, 15923697, 32039816, 63611885, 124689752, 241431996, 462031599, 874300348, 1636607223, 3031814449, 5560277156
OFFSET
1,3
COMMENTS
Column 3 of A184441
LINKS
EXAMPLE
Some solutions for n=5
..0....1....3....2....2....3....0....1....2....3....3....1....2....2....1....0
..0....0....0....1....1....0....3....2....0....0....0....2....2....3....2....1
..0....1....0....1....1....0....1....3....0....2....3....0....2....1....0....3
..0....3....2....2....3....3....1....1....3....1....1....3....2....0....2....2
..3....1....2....2....0....0....2....1....1....2....1....0....1....2....2....0
CROSSREFS
Sequence in context: A215274 A293457 A304782 * A112266 A287019 A215169
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 14 2011
STATUS
approved