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A221025 Sum of neighbor maps: log base 2 of the number of n X n binary arrays indicating the locations of corresponding elements equal to the sum mod 2 of their horizontal, vertical and antidiagonal neighbors in a random 0..1 n X n array 0
1, 3, 7, 16, 24, 33, 45, 63, 81, 100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A221028

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A190890 A116040 A218276 * A036666 A218359 A117491

Adjacent sequences:  A221022 A221023 A221024 * A221026 A221027 A221028

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 29 2012

STATUS

approved

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Last modified February 27 18:47 EST 2020. Contains 332308 sequences. (Running on oeis4.)