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Revision History for A268808

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Number of nX7 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.
(history; published version)

#6 by R. H. Hardin at Sat Feb 13 18:25:53 EST 2016

STATUS

editing

approved

#5 by R. H. Hardin at Sat Feb 13 18:25:48 EST 2016

LINKS

R. H. Hardin, <a href="/A268808/a268808.txt">Empirical recurrence of order 68</a>

STATUS

approved

editing

#4 by R. H. Hardin at Sat Feb 13 18:22:57 EST 2016

STATUS

editing

approved

#3 by R. H. Hardin at Sat Feb 13 18:22:53 EST 2016

LINKS

R. H. Hardin, <a href="/A268808/b268808.txt">Table of n, a(n) for n = 1..210</a>

#2 by R. H. Hardin at Sat Feb 13 18:22:30 EST 2016

NAME

allocated for R. H. Hardin

Number of nX7 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.

DATA

768, 4914, 48460, 640926, 8734264, 115671422, 1508087180, 19390335102, 246666802206, 3110082281974, 38924665296474, 484120668061458, 5988867204857378, 73740656947715536, 904257358969806890

OFFSET

1,1

COMMENTS

Column 7 of A268809.

FORMULA

Empirical recurrence of order 68 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A268809.

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Feb 13 2016

STATUS

approved

editing

#1 by R. H. Hardin at Sat Feb 13 18:15:59 EST 2016

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved