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 A268322 Number of length-(n+1) 0..3 arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero. 1
 2, 4, 11, 32, 102, 337, 1148, 3984, 14030, 49973, 179735, 652010, 2383857, 8779485, 32555471, 121497802, 456178652, 1722502343, 6538543106, 24942393310, 95581407132, 367817900179, 1420912978925, 5508514801624, 21423891255215 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A268327. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 15*a(n-1) -83*a(n-2) +181*a(n-3) +20*a(n-4) -632*a(n-5) +445*a(n-6) +849*a(n-7) -637*a(n-8) -673*a(n-9) +208*a(n-10) +260*a(n-11) +48*a(n-12) EXAMPLE Some solutions for n=10 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0 ..1....1....0....0....1....1....1....1....1....0....1....1....1....0....0....0 ..2....0....0....0....0....2....2....2....0....1....2....2....2....1....0....1 ..1....1....1....0....2....3....1....1....0....2....1....0....1....2....1....1 ..3....2....2....1....1....2....0....0....0....3....3....0....2....0....1....1 ..2....1....0....0....2....0....3....2....1....1....0....2....0....2....2....1 ..3....2....3....2....0....1....2....3....0....0....0....1....1....3....0....1 ..0....3....0....3....2....0....0....0....1....1....1....2....0....2....1....2 ..0....0....0....1....1....3....1....1....1....2....1....0....1....1....1....3 ..0....0....0....3....2....0....3....2....0....0....0....3....0....2....0....0 ..1....1....0....2....0....0....2....1....2....0....3....1....1....0....0....0 CROSSREFS Cf. A268327. Sequence in context: A135339 A148170 A156043 * A148171 A318644 A113774 Adjacent sequences:  A268319 A268320 A268321 * A268323 A268324 A268325 KEYWORD nonn AUTHOR R. H. Hardin, Feb 01 2016 STATUS approved

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Last modified October 15 23:54 EDT 2019. Contains 328038 sequences. (Running on oeis4.)