Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,2 for x=0,1,2,3,4.
A197239
Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,2 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =18a(2) =156a(3) =1221a(4) =10649a(5) =89527a(6) =750414a(7) =6315333a(8) =53202193a(9) =448046100a(10) =3771630940a(11) =31755317844a(12) =267372295449
External references
- oeis: A197239