A304925 - OEIS

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A304925

Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 5 or 7 king-move adjacent elements, with upper left element zero.

64, 101, 466, 2510, 16158, 104451, 649029, 4123792, 26044218, 164807242, 1044534208, 6613431999, 41884985873, 265314965161, 1680416845681, 10643571331212, 67416006000459, 427006099213009, 2704626555301813

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 7 of A304926.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A304926.

Sequence in context: A303960 A304603 A305339 * A316419 A306165 A317382

Adjacent sequences: A304922 A304923 A304924 * A304926 A304927 A304928

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 21 2018

STATUS

approved