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 A212834 Number of 0..7 arrays of length n+1 with 0 never adjacent to 7. 1
 62, 482, 3746, 29114, 226274, 1758602, 13667858, 106226618, 825593474, 6416514026, 49869159026, 387583197338, 3012297335522, 23411580532682, 181954847741906, 1414153417389434, 10990803008177474, 85420541561578922 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A212835. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 7*a(n-1) + 6*a(n-2). Empirical g.f.: 2*x*(31 + 24*x) / (1 - 7*x - 6*x^2). - Colin Barker, Jul 21 2018 EXAMPLE Some solutions for n=5: ..4....4....2....6....2....4....0....2....4....2....2....0....2....4....2....4 ..3....1....2....4....1....0....0....1....6....4....7....5....7....2....5....0 ..3....2....0....7....7....2....3....1....0....3....2....6....7....5....2....3 ..5....1....1....4....2....6....7....2....3....5....6....1....1....7....1....2 ..0....1....6....6....4....4....6....3....2....6....3....5....2....1....4....7 ..2....0....2....4....0....3....2....4....2....1....1....3....4....5....5....5 CROSSREFS Cf. A212835. Sequence in context: A010746 A124995 A020191 * A202959 A209913 A209906 Adjacent sequences:  A212831 A212832 A212833 * A212835 A212836 A212837 KEYWORD nonn AUTHOR R. H. Hardin, May 28 2012 STATUS approved

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Last modified January 28 13:34 EST 2022. Contains 350656 sequences. (Running on oeis4.)