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A245948 Number of length n+3 0..6 arrays with some pair in every consecutive four terms totalling exactly 6 1
1435, 7669, 39721, 199141, 1021225, 5208673, 26526337, 135336793, 690045061, 3518298991, 17940920173, 91480646389, 466463146399, 2378531818147, 12128251046821, 61842638080231, 315339231002215, 1607932492222021 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A245950

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 4*a(n-1) +8*a(n-2) +2*a(n-3) -39*a(n-4) -139*a(n-5) -175*a(n-6) -179*a(n-7) +980*a(n-8) +1638*a(n-9) -1266*a(n-10) -210*a(n-11) -352*a(n-12) +123*a(n-13) +24*a(n-14) +19*a(n-15) -5*a(n-16)

EXAMPLE

Some solutions for n=4

..3....4....0....4....0....1....3....4....4....1....0....4....4....3....1....4

..6....5....5....6....2....4....2....5....3....1....1....1....3....6....4....1

..1....4....6....1....4....2....3....1....2....4....0....5....3....5....6....1

..0....1....5....0....5....5....4....5....4....2....6....6....3....1....0....5

..6....4....1....6....6....0....2....6....5....4....2....1....3....0....1....3

..6....5....4....2....0....6....2....2....5....0....4....2....1....0....0....1

..1....2....5....1....4....2....1....4....1....4....1....0....2....6....5....5

CROSSREFS

Sequence in context: A169822 A114083 A143475 * A221004 A204862 A227494

Adjacent sequences:  A245945 A245946 A245947 * A245949 A245950 A245951

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 08 2014

STATUS

approved

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Last modified April 18 16:51 EDT 2021. Contains 343089 sequences. (Running on oeis4.)