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 A242548 Number of length n+3 0..7 arrays with no four elements in a row with pattern aabb (possibly a=b) and new values 0..7 introduced in 0..7 order 1
 13, 43, 166, 712, 3340, 17004, 93103, 543773, 3362689, 21854355, 148145552, 1039764960, 7504319914, 55361803579, 415379230159, 3156808241415, 24223346602916, 187213792659552, 1454634743756302, 11346966341306231 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A242549 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 22*a(n-1) -190*a(n-2) +924*a(n-3) -3465*a(n-4) +10962*a(n-5) -24402*a(n-6) +45828*a(n-7) -74016*a(n-8) +19016*a(n-9) -23090*a(n-10) -159064*a(n-11) +571211*a(n-12) +704098*a(n-13) +1846562*a(n-14) +2774132*a(n-15) +616507*a(n-16) -2599138*a(n-17) -8906720*a(n-18) -16117180*a(n-19) -18096476*a(n-20) -15823920*a(n-21) -10584000*a(n-22) -4233600*a(n-23) -705600*a(n-24) EXAMPLE Some solutions for n=4 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0 ..1....1....1....1....1....1....1....1....0....0....1....1....1....1....1....1 ..1....2....0....2....0....2....2....2....1....1....1....1....0....2....1....2 ..0....2....2....1....0....0....3....3....2....2....2....1....0....3....2....3 ..2....1....2....3....2....0....1....2....1....1....3....0....1....4....0....4 ..1....2....1....4....1....2....0....1....3....0....3....2....2....1....0....4 ..1....3....3....0....2....3....3....1....0....2....2....1....3....0....0....0 CROSSREFS Sequence in context: A242545 A242546 A242547 * A104115 A063650 A220612 Adjacent sequences: A242545 A242546 A242547 * A242549 A242550 A242551 KEYWORD nonn AUTHOR R. H. Hardin, May 17 2014 STATUS approved

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Last modified February 28 20:40 EST 2024. Contains 370400 sequences. (Running on oeis4.)