OFFSET
1,2
COMMENTS
Column 4 of A283784.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 21*a(n-1) -75*a(n-2) -500*a(n-3) -681*a(n-4) +14070*a(n-5) +66834*a(n-6) +139032*a(n-7) -160275*a(n-8) -1405556*a(n-9) -3401838*a(n-10) -791658*a(n-11) +13175067*a(n-12) +36437481*a(n-13) +23855217*a(n-14) -68703699*a(n-15) -216054840*a(n-16) -171287535*a(n-17) +224531338*a(n-18) +760107903*a(n-19) +595077312*a(n-20) -505895393*a(n-21) -1576187241*a(n-22) -1019970015*a(n-23) +756331656*a(n-24) +1728765105*a(n-25) +791098521*a(n-26) -581764517*a(n-27) -828007422*a(n-28) -234508218*a(n-29) +151749818*a(n-30) +120782574*a(n-31) +37179264*a(n-32) +12003673*a(n-33) -692574*a(n-34) -4660656*a(n-35) -2434512*a(n-36) -906336*a(n-37) -352896*a(n-38) -94208*a(n-39) -17664*a(n-40) -3840*a(n-41) -512*a(n-42)
EXAMPLE
Some solutions for n=4
..0..0..1..1. .1..1..0..0. .0..0..0..1. .1..1..0..1. .1..1..0..0
..0..1..1..1. .1..1..0..1. .0..0..1..1. .1..0..1..1. .1..1..0..1
..0..1..0..0. .1..0..1..0. .1..1..1..0. .0..0..1..0. .1..1..0..0
..0..0..0..1. .1..0..1..1. .1..0..1..0. .0..1..0..0. .0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 16 2017
STATUS
approved