Number of (n+1)X(1+1) arrays of permutations of 0..n*2+1 filled by rows with each element moved a city block distance of 1 or 2, and rows and columns in increasing lexicographic order.
A263582
Number of (n+1)X(1+1) arrays of permutations of 0..n*2+1 filled by rows with each element moved a city block distance of 1 or 2, and rows and columns in increasing lexicographic order.
Terms
- a(0) =1a(1) =4a(2) =18a(3) =70a(4) =292a(5) =1212a(6) =5028a(7) =20832a(8) =86360a(9) =358008a(10) =1484112a(11) =6152272a(12) =25503888a(13) =105724928a(14) =438276640a(15) =1816850528a(16) =7531649344a(17) =31222019264a(18) =129429085248a(19) =536540828672
External references
- oeis: A263582