Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302317
Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =20a(2) =65a(3) =281a(4) =1144a(5) =4321a(6) =18093a(7) =72746a(8) =285199a(9) =1170837a(10) =4701572a(11) =18728977a(12) =76116025a(13) =305826310a(14) =1226299079a(15) =4959269105a(16) =19941716260a(17) =80172499973a(18) =323467010101
External references
- oeis: A302317