Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change (+-,+-) 0,0 1,1 or 1,2.
A263965
Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change (+-,+-) 0,0 1,1 or 1,2.
Terms
- a(0) =4a(1) =20a(2) =108a(3) =465a(4) =2265a(5) =10920a(6) =52752a(7) =253176a(8) =1221305a(9) =5885873a(10) =28368956a(11) =136712788a(12) =658952404a(13) =3175970497a(14) =15307435585a(15) =73778034832a(16) =355593913600
External references
- oeis: A263965