Number of (n+1) X (5+1) 0..2 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock.
A235881
Number of (n+1) X (5+1) 0..2 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock.
Terms
- a(0) =921a(1) =1311a(2) =2109a(3) =3759a(4) =7221a(5) =14631a(6) =30909a(7) =67839a(8) =154821a(9) =368151a(10) =912909a(11) =2356719a(12) =6307221a(13) =17396871a(14) =49142109a(15) =141330399a(16) =411800421a(17) =1211020791a(18) =3584302509a(19) =10655388879a(20) =31771130421a(21) =94923319911a(22) =283989818109a(23) =850409172159
External references
- oeis: A235881