Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock summing to 3 6 or 9.
A251293
Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock summing to 3 6 or 9.
Terms
- a(0) =84a(1) =444a(2) =2356a(3) =12556a(4) =67204a(5) =361244a(6) =1950036a(7) =10570156a(8) =57525924a(9) =314285244a(10) =1723404916a(11) =9483540556a(12) =52358197444a(13) =289959524444
External references
- oeis: A251293