Number of nX6 0..1 arrays with every element unequal to 0, 1, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318348
Number of nX6 0..1 arrays with every element unequal to 0, 1, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =13a(1) =18a(2) =41a(3) =55a(4) =136a(5) =345a(6) =842a(7) =2167a(8) =5544a(9) =14244a(10) =36572a(11) =94381a(12) =243153a(13) =629090a(14) =1626951a(15) =4215276a(16) =10927245a(17) =28335336a(18) =73504819a(19) =190696269a(20) =494767839a(21) =1283719592a(22) =3330784937a(23) =8642038996a(24) =22422738925a(25) =58177733612a(26) =150947560518
External references
- oeis: A318348