Number of (n+1)X(4+1) 0..2 arrays colored with the upper median plus the lower median minus the minimum of every 2X2 subblock.
A237681
Number of (n+1)X(4+1) 0..2 arrays colored with the upper median plus the lower median minus the minimum of every 2X2 subblock.
Terms
- a(0) =15948a(1) =308814a(2) =5732688a(3) =109962932a(4) =2160608712a(5) =42145629006a(6) =813403060652
External references
- oeis: A237681