This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A202200 Number of (n+2) X 8 binary arrays avoiding patterns 001 and 101 in rows and columns. 1
 1728, 7680, 26400, 76032, 192192, 439296, 926640, 1830400, 3422848, 6110208, 10480704, 17364480, 27907200, 43659264, 66682704, 99677952, 146132800, 210496000, 298378080, 416782080, 574367040, 781747200, 1051830000, 1400196096 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A202202. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (n+8)*(n+7)*(n+6)*(n+5)*(n+4)*(n+3)*(n+2)^2/315. Conjectures from Colin Barker, May 27 2018: (Start) G.f.: 16*x*(108 - 492*x + 1218*x^2 - 1890*x^3 + 1932*x^4 - 1308*x^5 + 567*x^6 - 143*x^7 + 16*x^8) / (1 - x)^9. a(n) = 9*a(n-1) - 36*a(n-2) + 84*a(n-3) - 126*a(n-4) + 126*a(n-5) - 84*a(n-6) + 36*a(n-7) - 9*a(n-8) + a(n-9) for n>9. (End) EXAMPLE Some solutions for n=2: ..1..1..1..1..1..1..1..0....0..1..1..1..1..1..1..1....0..1..1..1..0..0..0..0 ..1..1..1..1..1..0..0..0....1..1..1..1..1..1..0..0....1..0..0..0..0..0..0..0 ..1..1..1..1..0..0..0..0....0..1..1..1..1..0..0..0....1..0..0..0..0..0..0..0 ..0..1..1..0..0..0..0..0....0..1..1..1..0..0..0..0....0..0..0..0..0..0..0..0 CROSSREFS Cf. A202202. Sequence in context: A305475 A202458 A179694 * A251188 A323560 A223236 Adjacent sequences:  A202197 A202198 A202199 * A202201 A202202 A202203 KEYWORD nonn AUTHOR R. H. Hardin, Dec 14 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 March 20 13:18 EDT 2019. Contains 321345 sequences. (Running on oeis4.)