Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock diagonal maximum plus antidiagonal minimum unequal to its neighbors horizontally, vertically and ne+sw antidiagonally.
A253401
Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock diagonal maximum plus antidiagonal minimum unequal to its neighbors horizontally, vertically and ne+sw antidiagonally.
Terms
- a(0) =480a(1) =2192a(2) =8168a(3) =37828a(4) =158472a(5) =638602a(6) =2763096a(7) =11635116a(8) =48192624a(9) =204426054a(10) =860035398a(11) =3595579764a(12) =15165108854a(13) =63753731972a(14) =267437028486
External references
- oeis: A253401