Number of (1+1) X (n+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.
A263603
Number of (1+1) X (n+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) =7a(2) =15a(3) =27a(4) =55a(5) =109a(6) =199a(7) =347a(8) =595a(9) =1005a(10) =1671a(11) =2751a(12) =4507a(13) =7357a(14) =11971a(15) =19439a(16) =31531a(17) =51105a(18) =82779a(19) =134031a(20) =216967a(21) =351169a(22) =568315a(23) =919667a(24) =1488175a(25) =2408049a(26) =3896439a(27) =6304707a(28) =10201375a(29) =16506325
External references
- oeis: A263603