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A208313 Number of nX7 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors 1
64, 1458, 26772, 459810, 7702668, 127750122, 2110085532, 34794255294, 573347277990, 9445146465474, 155579502783600, 2562580517033736, 42208064346447486, 695201252701136796, 11450503035670908312 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A208314

LINKS

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

FORMULA

Empirical: a(n) = 65*a(n-1) -1953*a(n-2) +36966*a(n-3) -502122*a(n-4) +5256909*a(n-5) -44318169*a(n-6) +309490947*a(n-7) -1823975982*a(n-8) +9183492558*a(n-9) -39813195762*a(n-10) +149339766420*a(n-11) -486017305326*a(n-12) +1374228095598*a(n-13) -3377800131066*a(n-14) +7218074976993*a(n-15) -13409006027409*a(n-16) +21654224930979*a(n-17) -30400201179594*a(n-18) +37104158581146*a(n-19) -39367401731406*a(n-20) +36289563240060*a(n-21) -29023819710498*a(n-22) +20084298224346*a(n-23) -11967106417902*a(n-24) +6091710309801*a(n-25) -2616943561281*a(n-26) +931245658623*a(n-27) -266848217802*a(n-28) +58935744018*a(n-29) -9341138457*a(n-30) +932678955*a(n-31) -43046721*a(n-32)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A264086 A239442 A240930 * A145218 A282526 A014794

Adjacent sequences:  A208310 A208311 A208312 * A208314 A208315 A208316

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 25 2012

STATUS

approved

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Last modified January 16 16:32 EST 2022. Contains 350376 sequences. (Running on oeis4.)