OFFSET
1,1
COMMENTS
Column 3 of A223831
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (5051/239500800)*n^12 + (17911/39916800)*n^11 + (113633/21772800)*n^10 + (27157/725760)*n^9 + (1331621/7257600)*n^8 + (36461/57600)*n^7 + (35192219/21772800)*n^6 + (2190431/725760)*n^5 + (24210049/5443200)*n^4 + (4187689/907200)*n^3 + (882989/207900)*n^2 + (2173/990)*n + 1
EXAMPLE
Some solutions for n=3
..0..0..2....1..2..0....1..0..0....2..0..0....1..1..1....1..1..1....1..2..0
..1..2..0....2..2..1....2..2..1....1..1..0....0..1..0....1..1..0....1..1..1
..1..1..0....0..0..0....2..2..0....1..1..2....0..2..0....1..0..0....2..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved