Number of (n+1) X (1+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or vertically.
A232425
Number of (n+1) X (1+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or vertically.
Terms
- a(0) =4a(1) =16a(2) =64a(3) =240a(4) =988a(5) =3964a(6) =15844a(7) =63808a(8) =256096a(9) =1029152a(10) =4133548a(11) =16607836a(12) =66714260a(13) =268019952a(14) =1076703872a(15) =4325480208a(16) =17376731196a(17) =69807805884a(18) =280439281284
External references
- oeis: A232425