This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A203086 Number of (n+2)X5 binary arrays avoiding patterns 000 and 101 in rows and columns 1
 621, 2237, 7558, 26528, 92748, 319956, 1110338, 3857116, 13368366, 46374172, 160928422, 558198034, 1936342232, 6717789912, 23304299530, 80843139172, 280454591492, 972921980908, 3375134923804, 11708636231942, 40618271541636 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A203091 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +2*a(n-2) +19*a(n-3) +17*a(n-4) +5*a(n-5) -57*a(n-6) -51*a(n-7) +48*a(n-8) +197*a(n-9) -63*a(n-10) -429*a(n-11) -144*a(n-12) +443*a(n-13) +246*a(n-14) -220*a(n-15) -81*a(n-16) +58*a(n-17) -65*a(n-18) +10*a(n-19) +49*a(n-20) +20*a(n-21) +20*a(n-22) for n>24 EXAMPLE Some solutions for n=3 ..0..1..1..1..1....0..0..1..1..0....1..1..0..0..1....1..0..0..1..0 ..1..1..1..1..1....1..1..1..1..1....1..1..0..0..1....0..0..1..0..0 ..0..1..1..1..1....0..1..1..0..0....0..0..1..1..0....0..1..0..0..1 ..0..1..1..1..0....0..1..1..0..0....0..0..1..1..0....1..0..0..1..1 ..1..0..0..1..0....1..0..0..1..1....1..1..1..1..1....0..0..1..0..0 CROSSREFS Sequence in context: A252527 A232422 A189119 * A251243 A184226 A260764 Adjacent sequences:  A203083 A203084 A203085 * A203087 A203088 A203089 KEYWORD nonn AUTHOR R. H. Hardin Dec 29 2011 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.

Last modified December 9 13:50 EST 2019. Contains 329877 sequences. (Running on oeis4.)