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 A253478 Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically 1
 558, 6804, 85280, 1066300, 13347930, 166986430, 2089637292, 26146542588, 327171117860, 4093826224868, 51225496342820, 640976478054436, 8020442466701434, 100358565951977392, 1255771461301697900 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A253482 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 88 FORMULA Empirical recurrence of order 88 (see link above) EXAMPLE Some solutions for n=3 ..1..1..0....1..2..0....0..1..0....1..1..2....1..2..2....2..2..1....2..1..0 ..0..2..2....0..0..1....2..2..2....0..2..1....1..2..1....0..1..2....0..0..2 ..2..1..0....2..0..2....1..2..0....0..0..2....0..1..0....0..2..1....2..0..2 ..2..2..2....2..0..0....1..1..1....1..1..0....1..1..0....1..1..1....1..0..1 CROSSREFS Sequence in context: A253290 A206123 A253160 * A253483 A185772 A186134 Adjacent sequences: A253475 A253476 A253477 * A253479 A253480 A253481 KEYWORD nonn AUTHOR R. H. Hardin, Jan 02 2015 STATUS approved

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Last modified July 20 06:10 EDT 2024. Contains 374441 sequences. (Running on oeis4.)