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A208713 Number of 6Xn 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors 1
32, 2048, 67228, 2587924, 96373248, 3613193828, 135288700496, 5066922301172, 189760457060980, 7106753308593540, 266155856593675476, 9967837469474701148, 373306752240786865244, 13980758919336720329676, 523595189388352085042024 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A208709

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 33*a(n-1) +263*a(n-2) -3223*a(n-3) -18036*a(n-4) +125510*a(n-5) +521961*a(n-6) -2559903*a(n-7) -7083315*a(n-8) +29279065*a(n-9) +41849338*a(n-10) -177571622*a(n-11) -69714760*a(n-12) +472051228*a(n-13) -17024841*a(n-14) -616904041*a(n-15) +139939476*a(n-16) +429455960*a(n-17) -134077368*a(n-18) -166807014*a(n-19) +56749363*a(n-20) +37221787*a(n-21) -12479641*a(n-22) -4662939*a(n-23) +1470709*a(n-24) +288889*a(n-25) -88672*a(n-26) -5330*a(n-27) +2180*a(n-28) -112*a(n-29) for n>33

EXAMPLE

Some solutions for n=4

..0..1..0..1....0..1..1..1....0..0..0..0....0..1..1..0....0..0..0..1

..0..0..1..0....1..0..1..1....0..1..0..1....1..0..1..1....0..1..0..0

..1..1..1..0....1..1..0..1....0..1..1..0....0..1..0..1....1..1..0..0

..0..1..1..0....1..1..0..1....1..0..0..1....0..0..1..1....0..0..1..1

..1..0..0..1....0..1..1..0....1..0..0..1....1..0..0..1....0..1..0..1

..1..0..1..1....0..0..1..1....0..1..1..1....0..1..1..1....1..0..1..0

CROSSREFS

Sequence in context: A248073 A264015 A239646 * A213416 A159364 A202734

Adjacent sequences:  A208710 A208711 A208712 * A208714 A208715 A208716

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 01 2012

STATUS

approved

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Last modified July 30 05:09 EDT 2016. Contains 275173 sequences.