Number of (n+1) X (1+1) 0..2 arrays with the upper median plus the lower median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.
A237560
Number of (n+1) X (1+1) 0..2 arrays with the upper median plus the lower median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.
Terms
- a(0) =81a(1) =316a(2) =1256a(3) =4984a(4) =19900a(5) =78144a(6) =311512a(7) =1227648a(8) =4896848a(9) =19273664a(10) =76861056a(11) =302658560a(12) =1207072128a(13) =4752337152a(14) =18952790656a(15) =74623190528a(16) =297608324608
External references
- oeis: A237560