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 A202567 Number of (n+3)X4 binary arrays with no more than two of any consecutive four bits set in any row or column 1
 7343, 56821, 447963, 3525903, 27425677, 213463753, 1666015233, 12999566073, 101412911113, 790978473677, 6170149889927, 48131634245907, 375459360021267, 2928810273128489, 22846522525694475, 178217379032743251 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A202574 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 6*a(n-1) +17*a(n-2) -31*a(n-3) +142*a(n-4) -94*a(n-5) -4526*a(n-6) +2435*a(n-7) +5499*a(n-8) -3566*a(n-9) -284*a(n-10) +20671*a(n-11) -3473*a(n-12) -1834*a(n-13) +37405*a(n-14) +113249*a(n-15) -193747*a(n-16) -171282*a(n-17) +35862*a(n-18) -247228*a(n-19) -108314*a(n-20) +659634*a(n-21) -22532*a(n-22) +124304*a(n-23) +16148*a(n-24) -49068*a(n-25) -42800*a(n-26) -2728*a(n-27) -5440*a(n-28) +336*a(n-29) EXAMPLE Some solutions for n=2 ..1..0..0..0....0..1..0..1....1..1..0..0....0..1..0..1....0..0..0..1 ..1..1..0..0....1..1..0..0....0..0..1..0....1..1..0..0....0..0..1..1 ..0..1..0..0....1..0..1..0....0..1..1..0....1..0..1..0....1..0..0..0 ..0..0..1..1....0..0..0..0....0..0..0..1....0..0..0..1....0..0..0..0 ..0..0..1..1....0..1..0..1....0..1..0..0....0..1..0..1....1..0..0..1 CROSSREFS Sequence in context: A295003 A097696 A202574 * A202566 A204507 A295002 Adjacent sequences: A202564 A202565 A202566 * A202568 A202569 A202570 KEYWORD nonn AUTHOR R. H. Hardin Dec 21 2011 STATUS approved

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Last modified July 22 09:18 EDT 2024. Contains 374485 sequences. (Running on oeis4.)