OFFSET
1,1
COMMENTS
Column 4 of A246892
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +6*a(n-2) +5*a(n-3) +17*a(n-4) -16*a(n-5) -117*a(n-6) -174*a(n-7) -295*a(n-8) -478*a(n-9) +437*a(n-10) +1237*a(n-11) +663*a(n-12) +1581*a(n-13) +2542*a(n-14) -1551*a(n-15) -2164*a(n-16) -1754*a(n-17) -1473*a(n-18) +623*a(n-19) +1190*a(n-20) +651*a(n-21) +184*a(n-22) -263*a(n-23) -141*a(n-24) -109*a(n-25) -11*a(n-26) +46*a(n-27) +9*a(n-28) +10*a(n-29) +2*a(n-30) -3*a(n-31)
EXAMPLE
Some solutions for n=3
..4....4....4....1....4....4....1....4....4....1....4....4....0....3....3....2
..3....4....3....0....4....3....1....1....4....1....3....4....2....1....2....3
..2....4....1....1....3....0....4....4....2....4....4....0....0....2....3....2
..2....3....4....2....0....4....3....2....1....3....2....1....4....4....1....4
..3....0....0....2....4....2....1....2....2....4....1....0....3....1....3....1
..0....0....3....2....0....0....3....3....3....2....1....4....0....2....4....0
..3....2....0....4....3....0....3....4....1....0....0....0....2....1....1....4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 06 2014
STATUS
approved