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 0 or 2, and rows and columns in increasing lexicographic order.
A263598
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 0 or 2, and rows and columns in increasing lexicographic order.
Terms
- a(0) =2a(1) =8a(2) =24a(3) =60a(4) =160a(5) =448a(6) =1232a(7) =3344a(8) =9120a(9) =24960a(10) =68224a(11) =186304a(12) =508928a(13) =1390592a(14) =3799296a(15) =10379520a(16) =28357120a(17) =77473792a(18) =211662848a(19) =578272256a(20) =1579868160a(21) =4316282880a(22) =11792306176a(23) =32217174016a(24) =88018952192a(25) =240472260608
External references
- oeis: A263598