Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock summing to 2 4 or 6.
A251328
Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock summing to 2 4 or 6.
Terms
- a(0) =39a(1) =171a(2) =753a(3) =3333a(4) =14823a(5) =66219a(6) =297057a(7) =1337733a(8) =6045495a(9) =27408747a(10) =124625745a(11) =568146309a(12) =2596130823a(13) =11887635627a(14) =54533628609a(15) =250576195845
External references
- oeis: A251328