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 A227677 Number of nX4 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X5 binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order 1
 11, 131, 1343, 11971, 90884, 592791, 3380440, 17161921, 78807477, 331649881, 1292860261, 4709556398, 16147197916, 52422604429, 161978060979, 478412562214, 1355794408584, 3698766477709, 9741946309658, 24835300279682, 61420677587519 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A227679 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical polynomial of degree 30 FORMULA Empirical polynomial of degree 30 (see link above) EXAMPLE Some solutions for n=4 ..1..0..0..1....0..1..0..1....0..0..0..0....0..1..0..1....0..1..1..0 ..0..1..1..1....1..0..0..1....1..0..1..0....1..0..1..0....1..0..0..1 ..1..1..0..0....0..1..1..0....0..0..0..1....1..0..0..1....0..1..1..0 ..0..1..0..0....0..0..1..0....1..1..1..0....0..0..0..0....0..0..0..0 CROSSREFS Sequence in context: A083763 A185127 A287295 * A302759 A076255 A076357 Adjacent sequences:  A227674 A227675 A227676 * A227678 A227679 A227680 KEYWORD nonn AUTHOR R. H. Hardin Jul 19 2013 STATUS approved

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Last modified January 18 20:57 EST 2019. Contains 319282 sequences. (Running on oeis4.)