OFFSET
1,2
COMMENTS
Column 4 of A277767.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 36*a(n-1) -68*a(n-2) -2713*a(n-3) +19931*a(n-4) -62381*a(n-5) +266374*a(n-6) -1845409*a(n-7) +9104329*a(n-8) -30969250*a(n-9) +54500421*a(n-10) +53064621*a(n-11) -345542021*a(n-12) +212559402*a(n-13) +480699801*a(n-14) +192091281*a(n-15) -2417781956*a(n-16) -1829259971*a(n-17) +4066046894*a(n-18) -3571370030*a(n-19) +3097594269*a(n-20) +5886612097*a(n-21) +1760414929*a(n-22) -275686906*a(n-23) -16985592806*a(n-24) +12147734232*a(n-25) -9614561545*a(n-26) +9010271063*a(n-27) +2069102963*a(n-28) -2314404621*a(n-29) -6065137060*a(n-30) +4076313465*a(n-31) +1271741772*a(n-32) -122381968*a(n-33) -1122738002*a(n-34) +138695692*a(n-35) +82444184*a(n-36) +98140208*a(n-37) -28064564*a(n-38) -7818348*a(n-39) -4302760*a(n-40) +3035424*a(n-41) -160928*a(n-42) -59072*a(n-43) -1152*a(n-44) for n>45
EXAMPLE
Some solutions for n=4
..0..1..2..0. .0..1..0..1. .0..1..2..0. .0..1..2..0. .0..1..2..0
..2..0..1..1. .2..2..2..2. .2..2..2..1. .2..0..1..1. .2..2..2..1
..1..0..0..2. .1..2..0..1. .1..0..0..2. .0..2..0..1. .2..0..1..0
..2..1..2..1. .0..0..0..2. .0..2..1..1. .1..0..0..2. .1..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 29 2016
STATUS
approved