A204569 - OEIS

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A204569

Number of (n+1)X6 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order

11448, 1075080, 112592256, 12184154082, 1331721926667, 146012317377342, 16024704563231697, 1759237470505955994, 193152837690597697122, 21207576736241661449097, 2328548082128091084529791 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Column 5 of A204572`
	LINKS	`R. H. Hardin, Table of n, a(n) for n = 1..210`
	FORMULA	`Empirical: a(n) = 179a(n-1) -8908a(n-2) +137964a(n-3) +1149807a(n-4) -62747265a(n-5) +808434446a(n-6) -4484318662a(n-7) +3275499119a(n-8) +100375182249a(n-9) -615570345873a(n-10) +1689825045573a(n-11) -2021674602024a(n-12) -928315208142a(n-13) +6467936966622a(n-14) -8574644356956a(n-15) +3987231788124a(n-16) +1799176026996a(n-17) -3081486709152a(n-18) +1405762064496a(n-19) -228153998592a(n-20)`
	EXAMPLE	`Some solutions for n=4` `..0..0..0..0..1..1....0..1..1..0..2..3....0..1..1..2..2..3....0..1..1..0..2..1` `..2..0..2..0..0..1....2..0..1..1..0..2....0..0..1..1..2..2....1..1..0..3..0..2` `..3..2..2..2..0..0....0..1..2..1..1..0....3..0..0..1..1..2....3..1..1..0..1..0` `..3..3..2..2..2..0....2..0..1..1..0..2....0..1..0..0..1..1....2..3..1..1..2..1` `..3..1..3..2..3..2....1..2..0..1..1..0....1..2..1..0..0..1....1..2..3..1..1..0`
	CROSSREFS	`Sequence in context: A154064 A140922 A216363 * A023071 A100972 A201048` `Adjacent sequences: A204566 A204567 A204568 * A204570 A204571 A204572`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 16 2012`
	STATUS	`approved`

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Last modified May 19 13:28 EDT 2013. Contains 225429 sequences.