OFFSET
1,1
COMMENTS
Column 2 of A234091
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 15*a(n-1) +63*a(n-2) -1819*a(n-3) +1828*a(n-4) +83526*a(n-5) -234628*a(n-6) -1956488*a(n-7) +7913364*a(n-8) +25348238*a(n-9) -140664604*a(n-10) -170845064*a(n-11) +1518227960*a(n-12) +267430412*a(n-13) -10517727959*a(n-14) +4894779280*a(n-15) +47847310876*a(n-16) -44362915413*a(n-17) -142970567194*a(n-18) +190811628475*a(n-19) +272397500941*a(n-20) -497015809111*a(n-21) -298289329261*a(n-22) +827459164395*a(n-23) +105965669495*a(n-24) -882448207414*a(n-25) +160469397880*a(n-26) +583890664124*a(n-27) -245991328636*a(n-28) -220260208832*a(n-29) +149004133904*a(n-30) +35867373136*a(n-31) -45292015424*a(n-32) +2213580928*a(n-33) +6336566272*a(n-34) -1340111616*a(n-35) -268196352*a(n-36) +89775104*a(n-37) +2504704*a(n-38) -1691648*a(n-39)
EXAMPLE
Some solutions for n=3
..1..4..2....5..2..1....3..2..1....2..3..4....4..2..5....3..0..0....2..4..5
..4..3..5....3..4..1....4..1..4....5..2..5....3..5..4....2..3..1....3..5..2
..1..4..2....2..1..2....4..3..4....3..2..3....4..2..3....3..0..2....2..4..3
..2..3..5....3..4..1....2..1..4....5..4..5....3..5..2....2..3..3....3..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2013
STATUS
approved