A198288 - OEIS

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A198288

Number of 2nX4 0..3 arrays with values 0..3 introduced in row major order and each element equal to exactly one horizontal and vertical neighbor

17, 2452, 413375, 72559212, 12940532183, 2322145946560, 417688220022251, 75197892524349728, 13542776983363615379, 2439305921057059368196, 439386062130801234903655, 79146996287674677581757652 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Column 2 of A198290`
	LINKS	`R. H. Hardin, Table of n, a(n) for n = 1..200`
	FORMULA	Empirical: a(n) = 341a(n-1) -38970a(n-2) +2135218a(n-3) -67448667a(n-4) +1375490159a(n-5) -19754442612a(n-6) +216233988876a(n-7) -1930500555319a(n-8) +14641614117891a(n-9) -95232147538058a(n-10) +525211971434290a(n-11) -2391181584630749a(n-12) +8566626104248057a(n-13) -21804187934100424a(n-14) +26325592371676176a(n-15) +62458261081740144a(n-16) -409636534740954048a(n-17) +948362811460747776a(n-18) -580420633538230272a(n-19) -2477378037254639616a(n-20) +6262481237853487104a(n-21) -5586587527536967680a(n-22) +1769580684990480384*a(n-23)
	EXAMPLE	`Some solutions for n=3` `..0..0..1..1....0..0..1..1....0..0..1..1....0..1..0..2....0..1..0..0` `..1..1..2..2....1..1..0..2....1..1..0..0....0..1..0..2....0..1..2..2` `..2..2..1..1....3..3..0..2....2..3..1..1....3..3..2..3....3..3..0..0` `..0..0..2..2....0..2..1..1....2..3..0..0....1..1..2..3....0..0..3..3` `..3..3..0..0....0..2..3..2....1..2..3..3....2..3..3..2....1..2..1..0` `..1..1..3..3....1..1..3..2....1..2..0..0....2..0..0..2....1..2..1..0`
	CROSSREFS	`Sequence in context: A221322 A135505 A171704 * A092814 A198594 A138199` `Adjacent sequences: A198285 A198286 A198287 * A198289 A198290 A198291`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Oct 23 2011`
	STATUS	`approved`

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Last modified May 24 09:20 EDT 2013. Contains 225617 sequences.