The On-Line Encyclopedia of Integer Sequences (OEIS)

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A316614

Number of n X 7 0..1 arrays with every element unequal to 0, 1, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
(history; published version)

#6 by Wesley Ivan Hurt at Sat Sep 25 10:51:22 EDT 2021

STATUS

editing

approved

#5 by Wesley Ivan Hurt at Sat Sep 25 10:51:17 EDT 2021

NAME

Number of nX7 n X 7 0..1 arrays with every element unequal to 0, 1, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

STATUS

approved

editing

#4 by R. H. Hardin at Sun Jul 08 16:15:38 EDT 2018

STATUS

editing

approved

#3 by R. H. Hardin at Sun Jul 08 16:15:35 EDT 2018

LINKS

R. H. Hardin, <a href="/A316614/b316614.txt">Table of n, a(n) for n = 1..210</a>

#2 by R. H. Hardin at Sun Jul 08 16:15:21 EDT 2018

NAME

allocated for R. H. Hardin

Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

DATA

21, 237, 245, 1074, 4719, 17224, 65158, 261426, 990387, 3768844, 14720334, 56653017, 217036116, 839438654, 3238254715, 12452927964, 48026433042, 185228062557, 713410490056, 2749613319152, 10600692230546, 40849824445421

OFFSET

1,1

COMMENTS

Column 7 of A316615.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316615.

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Jul 08 2018

STATUS

approved

editing

#1 by R. H. Hardin at Sun Jul 08 16:12:02 EDT 2018

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved