OFFSET
1,1
COMMENTS
Row 7 of A252407
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 155*a(n-3) -5730*a(n-6) -42198*a(n-9) +1622879*a(n-12) +2030179*a(n-15) -187657035*a(n-18) +329658691*a(n-21) +10540844124*a(n-24) -43470613344*a(n-27) -231395084395*a(n-30) +1705391090763*a(n-33) -1594780828281*a(n-36) -8202243837085*a(n-39) +13649139340934*a(n-42) +11408920742626*a(n-45) -29209549804863*a(n-48) -304063398727*a(n-51) +24481787927247*a(n-54) -9525504172387*a(n-57) -6487954567720*a(n-60) +5786348853028*a(n-63) -1143496074997*a(n-66) -870646129079*a(n-69) +657803408582*a(n-72) -2585391262*a(n-75) -95561243336*a(n-78) +6093576096*a(n-81) +5181361248*a(n-84) -76463712*a(n-87) -25142400*a(n-90) for n>91
EXAMPLE
Some solutions for n=4
..2..2..3..2..2..0....3..2..2..3..2..2....0..2..2..3..2..2....0..2..2..0..2..2
..1..3..3..1..3..3....2..3..2..2..0..2....2..3..2..2..3..2....3..1..3..3..1..3
..2..3..2..2..3..2....3..3..1..3..3..1....3..0..1..3..3..1....2..2..3..2..2..3
..2..2..3..2..2..3....3..2..2..3..2..2....3..2..2..3..2..2....3..2..2..0..2..2
..1..3..3..1..3..3....2..3..2..2..3..2....2..3..2..2..0..2....3..1..3..3..1..0
..2..0..2..2..3..2....3..0..1..3..3..1....3..3..1..3..3..1....2..2..3..2..2..3
..2..2..3..2..2..3....3..2..2..3..2..2....3..2..2..3..2..2....3..2..2..3..2..2
..1..3..3..1..3..3....2..3..2..2..0..2....2..3..2..2..3..2....3..1..3..3..1..0
..2..0..2..2..3..2....3..3..1..3..3..1....3..3..1..3..3..1....2..2..0..2..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved