OFFSET
1,1
COMMENTS
Column 4 of A210061
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 176*a(n-1) -12383*a(n-2) +457521*a(n-3) -9583668*a(n-4) +109074306*a(n-5) -432638439*a(n-6) -4419650349*a(n-7) +64230480793*a(n-8) -252540170918*a(n-9) -595255299234*a(n-10) +8433913817808*a(n-11) -21427208559976*a(n-12) -38069222537892*a(n-13) +289460472761408*a(n-14) -336643109299632*a(n-15) -883702002797616*a(n-16) +2460214504431920*a(n-17) -361513807179872*a(n-18) -4377499678974656*a(n-19) +3253938371960768*a(n-20) +2790969020407040*a(n-21) -3141539845016064*a(n-22) -669537234834176*a(n-23) +1122282161785600*a(n-24) +46793169024000*a(n-25) -143518636118016*a(n-26) -1001036759040*a(n-27) +3148485230592*a(n-28)
EXAMPLE
Some solutions for n=4
..0..1..0..0..0....0..0..0..0..0....0..0..0..1..2....0..1..0..0..0
..2..3..2..0..0....1..0..0..2..2....0..2..2..3..0....0..1..1..0..2
..2..2..2..2..0....0..0..3..1..1....0..0..2..2..1....1..1..1..0..0
..0..0..0..0..2....1..0..3..3..3....2..0..2..3..0....2..1..3..2..0
..0..2..0..2..0....1..1..2..3..3....0..0..0..1..2....2..1..3..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2012
STATUS
approved