Number of (1+1) X (n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally.
A232840
Number of (1+1) X (n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally.
Terms
- a(0) =4a(1) =16a(2) =216a(3) =710a(4) =3648a(5) =25642a(6) =139456a(7) =683250a(8) =3950740a(9) =22616130a(10) =120525288a(11) =658213410a(12) =3693117580a(13) =20305930298a(14) =110933224304a(15) =613037501594
External references
- oeis: A232840