Number of n X 3 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300422
Number of n X 3 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =10a(2) =53a(3) =272a(4) =1390a(5) =7179a(6) =37042a(7) =191135a(8) =986243a(9) =5089160a(10) =26260738a(11) =135509178a(12) =699246723a(13) =3608214131a(14) =18618905868a(15) =96076245152a(16) =495767309402
External references
- oeis: A300422