OFFSET
1,1
COMMENTS
Column 7 of A188874
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 81*a(n-1) -1148*a(n-2) +2556*a(n-3) -87366*a(n-4) +1804002*a(n-5) -2207080*a(n-6) -70867388*a(n-7) +32972423*a(n-8) +2230665197*a(n-9) -4086729504*a(n-10) -20624987348*a(n-11) +50383243988*a(n-12) +69637220740*a(n-13) -201496189584*a(n-14) -120647252112*a(n-15) +316308674064*a(n-16) +285744226640*a(n-17) -401376039168*a(n-18) -227877410240*a(n-19) +256361762048*a(n-20) +32746840064*a(n-21) -47500075008*a(n-22) +1588264960*a(n-23) +2488795136*a(n-24) -264241152*a(n-25) for n>28
EXAMPLE
Some solutions for 3X7
..0..1..1..0..1..0..0....0..1..1..0..0..1..1....0..0..1..0..1..0..0
..1..1..1..1..1..0..0....1..0..1..1..0..1..0....0..1..1..0..0..1..0
..1..1..0..0..1..1..1....1..1..1..1..1..1..0....0..0..1..1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 12 2011
STATUS
approved