Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.
A253527
Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.
Terms
- a(0) =459a(1) =2722a(2) =9255a(3) =27070a(4) =71333a(5) =176266a(6) =416901a(7) =955594a(8) =2141571a(9) =4715371a(10) =10248721a(11) =22049172a(12) =47076283a(13) =99907559a(14) =211046947a(15) =444155161a(16) =931919916a(17) =1950390796a(18) =4073131178a(19) =8490131272a(20) =17667326091a(21) =36708441877a(22) =76165100413a(23) =157828885543
External references
- oeis: A253527