Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303237
Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =11a(2) =18a(3) =55a(4) =181a(5) =494a(6) =1465a(7) =4415a(8) =12934a(9) =38423a(10) =114145a(11) =337914a(12) =1003161a(13) =2976083a(14) =8824906a(15) =26185191a(16) =77678573a(17) =230413110a(18) =683562697a(19) =2027805127a(20) =6015399582a(21) =17845009895a(22) =52937661977a(23) =157040038306a(24) =465863595657
External references
- oeis: A303237