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 A209533 Half the number of (n+1)X8 0..2 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences 1
 257, 4097, 65537, 1048577, 16777217, 268435457, 4294967297, 68719476737, 1099511627777, 17592186044417, 281474976710657, 4503599627370497, 72057594037927937, 1152921504606846977, 18446744073709551617 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A209534 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 16^(n+1)+1 EXAMPLE Some solutions for n=4 ..2..1..0..1..2..1..0..1....1..2..1..2..1..0..1..0....2..1..0..1..0..1..2..1 ..1..2..1..2..1..0..1..2....2..1..2..1..2..1..2..1....1..2..1..2..1..0..1..2 ..2..1..2..1..0..1..2..1....1..2..1..0..1..0..1..2....2..1..2..1..0..1..2..1 ..1..2..1..2..1..0..1..0....2..1..0..1..0..1..2..1....1..2..1..0..1..2..1..2 ..2..1..2..1..2..1..2..1....1..0..1..2..1..2..1..2....0..1..2..1..2..1..0..1 CROSSREFS Sequence in context: A070184 A054801 A173892 * A125648 A155468 A321564 Adjacent sequences:  A209530 A209531 A209532 * A209534 A209535 A209536 KEYWORD nonn AUTHOR R. H. Hardin Mar 10 2012 STATUS approved

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Last modified August 8 19:29 EDT 2020. Contains 336298 sequences. (Running on oeis4.)