The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A260927 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101 9
 36, 48, 48, 104, 68, 104, 186, 146, 146, 186, 297, 279, 401, 279, 297, 491, 468, 896, 896, 468, 491, 883, 831, 1800, 2208, 1800, 831, 883, 1489, 1528, 3358, 4522, 4522, 3358, 1528, 1489, 2534, 2750, 7680, 10617, 11608, 10617, 7680, 2750, 2534, 4289, 4874 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ...36...48...104....186.....297.....491......883......1489......2534.......4289 ...48...68...146....279.....468.....831.....1528......2750......4874.......8781 ..104..146...401....896....1800....3358.....7680.....14924.....32431......62992 ..186..279...896...2208....4522...10617....25690.....58606....134296.....314471 ..297..468..1800...4522...11608...27582....82766....191474....543551....1291912 ..491..831..3358..10617...27582...81848...253264....736065...2137558....6366003 ..883.1528..7680..25690...82766..253264...971381...2901724..10470430...32212024 .1489.2750.14924..58606..191474..736065..2901724..10662976..39563384..150551285 .2534.4874.32431.134296..543551.2137558.10470430..39563384.181422568..711441140 .4289.8781.62992.314471.1291912.6366003.32212024.150551285.711441140.3460352248 LINKS R. H. Hardin, Table of n, a(n) for n = 1..1200 FORMULA Empirical for column k: k=1: a(n) = a(n-2) +3*a(n-4) +2*a(n-5) +2*a(n-6) +3*a(n-7) +a(n-8) for n>10 k=2: a(n) = a(n-2) +6*a(n-4) +4*a(n-6) -a(n-8) for n>10 k=3: a(n) = a(n-2) +11*a(n-4) +13*a(n-6) -2*a(n-8) -2*a(n-10) +4*a(n-12) for n>15 k=4: [order 20] for n>22 k=5: [order 27] for n>28 k=6: [order 40] for n>42 k=7: [order 54] for n>59 EXAMPLE Some solutions for n=4 k=4 ..1..0..1..0..1..1....1..1..0..0..1..0....1..0..1..0..1..1....1..0..0..1..0..0 ..0..1..0..1..0..0....0..1..0..1..0..0....0..1..0..1..0..0....1..0..1..0..1..0 ..1..0..1..0..1..0....1..0..1..0..1..0....0..0..1..0..1..0....0..1..0..1..0..1 ..0..1..0..1..0..1....0..1..0..1..0..1....0..1..0..1..0..1....1..0..0..0..1..0 ..0..0..1..0..1..0....1..0..1..0..1..0....1..0..1..0..0..0....0..1..0..1..0..0 ..1..1..0..1..0..0....0..0..0..1..0..1....0..0..0..1..0..1....1..0..1..0..1..0 CROSSREFS Sequence in context: A167310 A083674 A160063 * A291713 A287840 A244326 Adjacent sequences:  A260924 A260925 A260926 * A260928 A260929 A260930 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Aug 04 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.

Last modified December 4 21:58 EST 2020. Contains 338941 sequences. (Running on oeis4.)