OFFSET
1,3
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-3) +3*a(n-4) +7*a(n-5) +25*a(n-7) -10*a(n-8) +7*a(n-9) -5*a(n-10) -23*a(n-11) -15*a(n-12) -4*a(n-13) -66*a(n-14) +23*a(n-15) -5*a(n-16) +16*a(n-17) +28*a(n-18) -14*a(n-19) +4*a(n-20) +55*a(n-21) -13*a(n-22) -7*a(n-23) -16*a(n-24) -8*a(n-25) +14*a(n-26) -2*a(n-27) -15*a(n-28) +a(n-30) +3*a(n-31) +a(n-32) -a(n-33) +a(n-35)
EXAMPLE
Some solutions for n=10
..1....3....3....1....1....1....1....1....5....1....3....5....1....1....1....5
..4....1....1....4....2....2....2....6....2....2....2....1....2....2....6....2
..2....2....2....2....5....3....3....7....3....7....7....2....5....3....3....3
..8....4....4....3....6....8....6....3....1....4....1....6....3....4....4....1
..5....9....5....5....9....4....4....2....9....5....9....9....7....5....2....4
..3....5....8....8....3....5....5....5....8....3....8....3....8....6....5....6
..9....6....7....9....4....6....9....4....4....6....4....4....4....7....9....9
..7...10...10....7....7....7...10...10...10....8....5....7...10...10...10...10
..6....8....6....6....8....9....8....8....6....9....6....8....6....8....8....8
.10....7....9...10...10...10....7....9....7...10...10...10....9....9....7....7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 24 2011
STATUS
approved