A183923 Number of nondecreasing arrangements of n numbers in -5..5 with sum zero and sum of squares not greater than n*30/3

1, 4, 12, 37, 93, 220, 476, 979, 1888, 3493, 6187, 10619, 17646, 28558, 45007, 69453, 104985, 155861, 227488, 327057, 463466, 648333, 895855, 1224083, 1654923, 2215739, 2939098, 3865358, 5042160, 6527147, 8388454, 10707515, 13578946

Offset

1,2

Comments

Column 5 of A183927

Links

R. H. Hardin, Table of n, a(n) for n = 1..169

Example

Some solutions for n=4
.-5...-5...-3...-3...-2...-3...-4....0...-4...-4...-2...-3...-2...-1...-2...-3
..1....0...-3...-3...-1....0...-1....0....0....1...-1...-2...-2...-1...-2...-2
..2....2....3....2....0....1....2....0....1....1....1....0....0...-1....2....1
..2....3....3....4....3....2....3....0....3....2....2....5....4....3....2....4

Crossrefs

Sequence in context: A164853 A076124 A247952 * A349053 A279277 A101555

Adjacent sequences: A183920 A183921 A183922 * A183924 A183925 A183926

Keyword

nonn

Author

R. H. Hardin Jan 08 2011

Status

approved