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 A297398 Number of 5Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 neighboring 1. 1
 1, 41, 139, 385, 3175, 14940, 58901, 325922, 1616869, 7303419, 36440971, 179690470, 852213260, 4150469302, 20279868193, 97720833639, 473767953000, 2303837003374, 11153405540217, 54053378441391, 262342164214663, 1271623035196752 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 5 of A297395. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +4*a(n-2) +69*a(n-3) +50*a(n-4) -a(n-5) -785*a(n-6) -696*a(n-7) -757*a(n-8) +2847*a(n-9) +1739*a(n-10) +270*a(n-11) -1916*a(n-12) -1560*a(n-13) -932*a(n-14) +1326*a(n-15) +652*a(n-16) +140*a(n-17) -373*a(n-18) -14*a(n-19) -28*a(n-20) +30*a(n-21) EXAMPLE Some solutions for n=5 ..0..1..1..0..0. .0..0..0..1..1. .0..0..1..0..0. .1..1..0..0..0 ..0..0..0..0..0. .1..1..0..0..0. .1..0..0..1..0. .0..0..0..1..0 ..1..0..0..0..0. .0..0..0..0..0. .0..1..0..0..0. .1..1..0..0..1 ..0..1..0..1..0. .0..0..0..0..0. .0..0..0..1..1. .0..0..0..0..0 ..0..0..0..0..1. .0..0..0..1..1. .0..0..0..0..0. .0..0..0..1..1 CROSSREFS Cf. A297395. Sequence in context: A325069 A321890 A253682 * A142449 A044373 A044754 Adjacent sequences: A297395 A297396 A297397 * A297399 A297400 A297401 KEYWORD nonn AUTHOR R. H. Hardin, Dec 29 2017 STATUS approved

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Last modified August 9 01:53 EDT 2024. Contains 375024 sequences. (Running on oeis4.)