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 A268455 Number of length-n 0..6 arrays with no adjacent pair x,x+1 followed at any distance by x+1,x. 1
 7, 49, 337, 2311, 15816, 108032, 736525, 5012171, 34047931, 230889543, 1563104184, 10564826628, 71293105297, 480355314513, 3231663192859, 21709801573961, 145636117720769, 975623832619371, 6526972402359763, 43608650962250889 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A268457. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 89 FORMULA Empirical recurrence of order 89 (see link above) EXAMPLE Some solutions for n=6 ..4....4....2....2....4....1....0....4....5....1....2....4....2....0....3....1 ..4....3....6....4....1....0....0....2....4....0....4....3....3....4....6....1 ..4....0....6....5....3....6....3....1....0....6....2....1....3....3....2....2 ..0....4....4....6....0....5....5....0....4....6....3....3....4....2....4....0 ..6....4....4....4....2....2....3....4....1....6....0....5....5....1....3....5 ..3....5....1....4....2....0....5....3....0....5....6....1....1....2....1....2 CROSSREFS Cf. A268457. Sequence in context: A269407 A269604 A269465 * A323559 A250349 A171281 Adjacent sequences:  A268452 A268453 A268454 * A268456 A268457 A268458 KEYWORD nonn AUTHOR R. H. Hardin, Feb 04 2016 STATUS approved

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Last modified September 24 14:46 EDT 2021. Contains 347643 sequences. (Running on oeis4.)