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A268055 Number of nX7 0..2 arrays with new values introduced in each row and column in sequential order starting with zero. 1
1, 64, 10438, 2796826, 915745002, 322124540754, 116124404018058, 42209510913723266, 15385058360607977882, 5612935794998414602514, 2048403161005485984441578, 747628311641175955079078306 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A268056.

LINKS

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

FORMULA

Empirical: a(n) = 549*a(n-1) -75693*a(n-2) +3237331*a(n-3) -45379926*a(n-4) +206208420*a(n-5) -255602200*a(n-6)

EXAMPLE

Some solutions for n=3

..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0

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

..0..1..0..2..0..0..2....0..1..0..2..1..0..2....0..1..2..1..1..1..0

CROSSREFS

Cf. A268056.

Sequence in context: A239403 A254607 A236690 * A268078 A202548 A209779

Adjacent sequences:  A268052 A268053 A268054 * A268056 A268057 A268058

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 25 2016

STATUS

approved

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Last modified January 23 22:36 EST 2020. Contains 331177 sequences. (Running on oeis4.)