Number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock summing to 6.
A183635
Number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock summing to 6.
Terms
- a(0) =136a(1) =340a(2) =952a(3) =2884a(4) =9256a(5) =31060a(6) =107992a(7) =386404a(8) =1415176a(9) =5281780a(10) =20015032a(11) =76773124a(12) =297329896a(13) =1160228500a(14) =4554034072a(15) =17956283044a(16) =71047145416a(17) =281857767220
External references
- oeis: A183635