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 A256731 Number of (n+2) X (4+2) 0..1 arrays with no 3 X 3 subblock diagonal sum zero and no antidiagonal sum three. 1
 73984, 1648656, 30294016, 635846656, 12465275904, 249872016384, 4910514177024, 97652975330304, 1928407075431424, 38241122864997376, 755959578691609600, 14964039006030816256, 295846953794462196736, 5852653217025122329600 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A256735. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 78 FORMULA Empirical recurrence of order 78 (see link above). EXAMPLE Some solutions for n=1 ..0..1..0..0..0..0....0..1..1..0..1..0....1..0..1..1..0..1....0..1..0..1..0..1 ..0..1..1..1..0..0....0..0..1..0..1..0....0..0..0..0..0..0....1..0..0..1..1..0 ..0..1..0..1..0..1....1..1..1..0..1..0....1..0..1..1..1..0....1..0..1..0..1..1 CROSSREFS Cf. A256735. Sequence in context: A172927 A172949 A172703 * A186835 A239587 A122065 Adjacent sequences: A256728 A256729 A256730 * A256732 A256733 A256734 KEYWORD nonn AUTHOR R. H. Hardin, Apr 09 2015 STATUS approved

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Last modified December 4 14:29 EST 2023. Contains 367563 sequences. (Running on oeis4.)