Number of (n+1) X (6+1) 0..2 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253493
Number of (n+1) X (6+1) 0..2 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =19701a(1) =20975a(2) =25715a(3) =37469a(4) =61955a(5) =113573a(6) =224747a(7) =470909a(8) =1034675a(9) =2376533a(10) =5703227a(11) =14285549a(12) =37236995a(13) =100500293a(14) =279108107a(15) =792567389a(16) =2288216915a(17) =6685708853a(18) =19699271387a(19) =58382132429a(20) =173715062435a(21) =518282546213
External references
- oeis: A253493