Number of (6+1) X (n+1) 0..2 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A253754
Number of (6+1) X (n+1) 0..2 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =95940a(1) =1087364a(2) =5648005a(3) =17656505a(4) =36766701a(5) =64166071a(6) =106040628a(7) =163826702a(8) =237829299a(9) =329185796a(10) =441266948a(11) =578004976a(12) =740961618a(13) =931230442a(14) =1153821258a(15) =1414293119a(16) =1714268872a(17) =2054996968a(18) =2443657919a(19) =2887832232a(20) =3389327580
External references
- oeis: A253754