Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
A253518
Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
Terms
- a(0) =470a(1) =2724a(2) =10706a(3) =42476a(4) =169828a(5) =666239a(6) =2544290a(7) =9487609a(8) =34708223a(9) =125073383a(10) =445366221a(11) =1570787157a(12) =5497239465a(13) =19116068115a(14) =66122139143a(15) =227698505309a(16) =781152679575
External references
- oeis: A253518