OFFSET
1,1
COMMENTS
Row 4 of A223789
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (456419/5230697472000)*n^16 + (165527/653837184000)*n^15 + (1160527/37362124800)*n^14 + (4098907/18681062400)*n^13 - (2323961/28740096000)*n^12 + (686821469/7185024000)*n^11 - (1282316951/1828915200)*n^10 + (6465409549/914457600)*n^9 + (69811138547/5225472000)*n^8 - (199799815457/326592000)*n^7 + (10755338490607/1437004800)*n^6 - (18136370082679/359251200)*n^5 + (23466839810116957/108972864000)*n^4 - (2416825957955693/4540536000)*n^3 + (2240986165151/4324320)*n^2 + (7139372965/18018)*n - 659081 for n>8
EXAMPLE
Some solutions for n=3
..1..1..1....0..1..0....1..1..0....0..1..2....0..2..0....0..0..1....1..2..0
..0..2..0....0..2..0....2..2..2....2..1..0....0..1..1....1..0..0....0..1..1
..2..1..0....0..0..2....0..2..2....1..1..0....0..1..2....0..1..0....1..2..0
..1..1..0....0..1..0....1..2..1....1..2..1....2..2..1....0..2..1....1..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved