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 A221107 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 and antidiagonal neighbors in a random 0..1 n X n array 0
 1, 4, 7, 14, 24, 34, 47, 62, 77, 100, 118, 144, 165 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A221108 LINKS EXAMPLE Some solutions for n=3 ..1..1..0....0..1..1....0..1..1....1..0..1....0..0..0....0..1..1....0..1..0 ..0..0..1....0..0..1....0..0..1....0..0..1....0..0..1....0..0..0....1..1..1 ..0..1..0....0..1..0....0..0..1....0..1..0....0..0..1....1..0..1....1..1..1 CROSSREFS Sequence in context: A048241 A003404 A139025 * A128610 A305124 A094968 Adjacent sequences:  A221104 A221105 A221106 * A221108 A221109 A221110 KEYWORD nonn AUTHOR R. H. Hardin Jan 02 2013 STATUS approved

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Last modified June 28 12:59 EDT 2022. Contains 354907 sequences. (Running on oeis4.)