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A300875 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 7, 52, 589, 12369, 447946, 33392871, 5113575513, 1429279770363, 778931167439996 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300881.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5:

  0 1 1 1 1    0 1 1 0 1    0 1 0 0 1    0 1 1 1 1

  1 0 0 0 1    1 0 0 0 1    0 1 0 1 1    1 0 0 0 0

  1 0 0 1 0    0 1 0 0 0    1 0 0 0 0    0 1 1 1 1

  1 0 0 1 0    1 0 0 1 0    1 1 0 0 1    1 0 0 0 1

  0 0 0 1 0    1 1 0 1 1    0 0 1 0 0    0 1 1 1 0

CROSSREFS

Cf. A300881.

Sequence in context: A300492 A179517 A300932 * A301485 A224501 A241487

Adjacent sequences:  A300872 A300873 A300874 * A300876 A300877 A300878

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Mar 14 2018

STATUS

approved

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Last modified August 14 01:55 EDT 2020. Contains 336476 sequences. (Running on oeis4.)