Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A253746
Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =28107a(1) =70590a(2) =583698a(3) =2351928a(4) =10966149a(5) =36766701a(6) =112645903a(7) =295452432a(8) =734787935a(9) =1658583509a(10) =3510427759a(11) =6967556836a(12) =13254580819a(13) =24069157677a(14) =42106383208a(15) =71123318652a(16) =116864959320a(17) =186850930571a(18) =291778710900
External references
- oeis: A253746