OFFSET
1,1
COMMENTS
Row 5 of A224310
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/1379196149760000)*n^20 - (1/137919614976000)*n^19 + (41/33874993152000)*n^18 + (1/426995712000)*n^17 + (88069/104613949440000)*n^16 + (102569/10461394944000)*n^15 + (1648459/2988969984000)*n^14 + (8052547/1494484992000)*n^13 + (615490013/2299207680000)*n^12 - (886807741/229920768000)*n^11 + (219072974333/3218890752000)*n^10 - (466264670551/1609445376000)*n^9 - (4824912304573/2490808320000)*n^8 + (350881754231/4981616640)*n^7 - (289916128775839/373621248000)*n^6 + (131084442677207/20756736000)*n^5 - (232251293325755159/6175128960000)*n^4 + (1510872624234341/8576568000)*n^3 - (2770659376747739/4655851200)*n^2 + (405320158706/285285)*n - 1873744 for n>9
EXAMPLE
Some solutions for n=3
..0..0..2....2..2..0....0..1..0....2..1..0....0..0..0....1..1..0....1..1..1
..0..2..0....2..2..0....1..0..0....1..2..0....0..2..1....1..1..1....2..2..0
..2..1..0....2..1..1....2..2..2....2..1..1....2..1..1....1..1..0....2..0..0
..1..1..1....2..1..1....2..2..2....2..1..0....2..2..0....1..1..0....0..2..0
..2..1..1....2..2..0....2..2..0....1..0..0....2..1..0....1..1..1....2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 03 2013
STATUS
approved