login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A260136 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 01010101 or 01010111 1
944, 3928, 22522, 85048, 365308, 1799114, 7839850, 33893514, 155470816, 697051946, 3073153820, 13791352932, 61881071698, 275443687654, 1230459293574, 5508072254348, 24593824347286, 109832226922584, 491024767206608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A260138

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-2) +61*a(n-3) +47*a(n-4) -60*a(n-5) -990*a(n-6) -1180*a(n-7) +352*a(n-8) +8249*a(n-9) +7603*a(n-10) -2855*a(n-11) -30388*a(n-12) -20354*a(n-13) +5185*a(n-14) +61744*a(n-15) +24167*a(n-16) -8563*a(n-17) -72780*a(n-18) -8588*a(n-19) +15051*a(n-20) +61538*a(n-21) -6778*a(n-22) -13766*a(n-23) -35716*a(n-24) +1294*a(n-25) +5880*a(n-26) +10338*a(n-27) +1680*a(n-28) -1116*a(n-30) for n>32

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A260138

Sequence in context: A268268 A106431 A234485 * A215838 A145493 A271765

Adjacent sequences:  A260133 A260134 A260135 * A260137 A260138 A260139

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 17 2015

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 20 05:51 EDT 2019. Contains 327212 sequences. (Running on oeis4.)