A246886 - OEIS

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A246886

Number of length n+4 0..2 arrays with some pair in every consecutive five terms totalling exactly 2

231, 673, 1961, 5711, 16621, 48393, 140893, 410197, 1194243, 3476929, 10122747, 29471409, 85803183, 249807769, 727291431, 2117439451, 6164722475, 17947999987, 52253885667, 152132191293, 442918327175, 1289514355131, 3754297734035 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Column 2 of A246892`
	LINKS	`R. H. Hardin, Table of n, a(n) for n = 1..210`
	FORMULA	`Empirical: a(n) = 2a(n-1) +2a(n-2) +a(n-3) +3a(n-4) -2a(n-6) -2a(n-7) -3a(n-8) -3*a(n-9) +a(n-11) +a(n-13) +a(n-14)`
	EXAMPLE	`Some solutions for n=6` `..1....1....1....2....0....0....1....2....0....0....1....2....2....1....1....0` `..2....1....2....2....0....1....1....2....2....0....1....1....0....0....0....1` `..2....1....1....1....0....0....2....0....1....2....2....2....1....2....1....1` `..0....1....2....1....2....0....2....0....2....1....2....2....0....1....1....2` `..0....2....1....2....0....2....0....1....2....1....1....1....0....2....0....0` `..0....1....2....2....0....1....1....2....0....1....1....1....1....1....0....2` `..1....2....0....2....2....0....0....2....2....0....2....0....1....2....2....0` `..2....1....2....0....1....2....1....0....0....2....0....0....0....2....1....2` `..0....0....2....1....0....0....1....2....2....1....0....1....0....1....1....0` `..1....1....1....0....0....1....2....1....2....1....2....1....0....1....1....2`
	CROSSREFS	`Sequence in context: A276832 A324319 A360214 * A258167 A287472 A350368` `Adjacent sequences: A246883 A246884 A246885 * A246887 A246888 A246889`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Sep 06 2014`
	STATUS	`approved`

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Last modified March 26 17:26 EDT 2023. Contains 361551 sequences. (Running on oeis4.)