Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300876
Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =18a(2) =52a(3) =148a(4) =440a(5) =1367a(6) =4297a(7) =13510a(8) =42216a(9) =131239a(10) =407238a(11) =1264321a(12) =3929780a(13) =12224311a(14) =38033755a(15) =118318333a(16) =367999398a(17) =1144440136a(18) =3559039439a(19) =11068454635a(20) =34423573923a(21) =107061087524a(22) =332971544913
External references
- oeis: A300876