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A202415 Number of (n+2)X4 binary arrays with no more than one of any consecutive three bits set in any row or column 1
94, 356, 1369, 5167, 19569, 74358, 281925, 1068716, 4054318, 15377537, 58314741, 221168653, 838835430, 3181337791, 12065537250, 45760307296, 173551434573, 658213326759, 2496355179281, 9467731905634, 35907499294429, 136183511806220 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A202421

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-2) +21*a(n-3) +29*a(n-4) +12*a(n-5) -21*a(n-6) -53*a(n-7) -41*a(n-8) +5*a(n-9) +21*a(n-10) +9*a(n-11) +4*a(n-12) +a(n-13)

EXAMPLE

Some solutions for n=5

..0..0..1..0....0..1..0..0....0..1..0..0....0..1..0..0....0..0..0..0

..0..1..0..0....0..0..0..0....1..0..0..0....0..0..1..0....0..0..0..0

..0..0..0..0....0..0..0..1....0..0..0..1....0..0..0..1....0..0..1..0

..0..0..1..0....0..0..1..0....0..1..0..0....0..0..0..0....0..0..0..1

..0..0..0..1....0..1..0..0....0..0..1..0....0..0..1..0....0..1..0..0

..0..1..0..0....0..0..0..1....1..0..0..1....1..0..0..0....0..0..0..0

..1..0..0..0....0..0..1..0....0..1..0..0....0..0..0..0....0..0..0..0

CROSSREFS

Sequence in context: A115996 A188185 A189811 * A174337 A116244 A086248

Adjacent sequences:  A202412 A202413 A202414 * A202416 A202417 A202418

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 19 2011

STATUS

approved

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Last modified November 30 05:00 EST 2021. Contains 349418 sequences. (Running on oeis4.)