Number of (n+1) X 3 0..2 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.
A186465
Number of (n+1) X 3 0..2 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.
Terms
- a(0) =83a(1) =129a(2) =243a(3) =562a(4) =903a(5) =1754a(6) =2937a(7) =5790a(8) =9993a(9) =19236a(10) =33546a(11) =63642a(12) =112278a(13) =210972a(14) =375366a(15) =700068a(16) =1253442a(17) =2324820a(18) =4182330a(19) =7725252a(20) =13947186a(21) =25682700a(22) =46491258a(23) =85412820a(24) =154924338a(25) =284132892a(26) =516138474a(27) =945381252a(28) =1719241122
External references
- oeis: A186465