OFFSET
1,1
COMMENTS
Column 1 of A252844.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 18*a(n-1) +86*a(n-2) -994*a(n-3) -1470*a(n-4) +18891*a(n-5) -10972*a(n-6) -137155*a(n-7) +458386*a(n-8) +344754*a(n-9) -5676836*a(n-10) -290377*a(n-11) +43535198*a(n-12) +4287236*a(n-13) -159925545*a(n-14) -268779654*a(n-15) +804335141*a(n-16) +970973386*a(n-17) -2078336878*a(n-18) -3319639002*a(n-19) +754228523*a(n-20) +13419206103*a(n-21) +72399252*a(n-22) -38090979845*a(n-23) +43488031150*a(n-24) +72529489617*a(n-25) -163864590116*a(n-26) -128284546312*a(n-27) +234353759810*a(n-28) +322369699828*a(n-29) -261073472809*a(n-30) -560583960661*a(n-31) +480777800264*a(n-32) +331536383724*a(n-33) -540088407387*a(n-34) +148832751298*a(n-35) +153685452410*a(n-36) -161131796324*a(n-37) +104433106016*a(n-38) -40744783252*a(n-39) -55519917168*a(n-40) +63985060128*a(n-41) -6939859596*a(n-42) -14022945384*a(n-43) +5677863960*a(n-44) -1166047488*a(n-45) +18214560*a(n-46) +517274496*a(n-47) -238736160*a(n-48) -10642752*a(n-49) +22851072*a(n-50) -2846016*a(n-51) -139968*a(n-52) for n > 53.
EXAMPLE
Some solutions for n=2
..0..0..1....0..1..1....0..0..1....0..1..0....0..0..1....0..1..1....0..1..1
..1..0..1....0..2..2....1..0..0....1..0..0....1..2..1....1..0..1....1..2..2
..1..1..2....1..1..2....1..2..2....2..3..3....1..1..2....0..1..0....3..3..0
..2..1..1....2..1..1....2..3..2....3..2..3....0..0..2....2..2..3....1..3..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 22 2014
STATUS
approved