Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 with each element having directed index change 1,0 0,-1 1,2 or -1,1.
A264584
Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 with each element having directed index change 1,0 0,-1 1,2 or -1,1.
Terms
- a(0) =0a(1) =1a(2) =0a(3) =1a(4) =1a(5) =1a(6) =3a(7) =1a(8) =3a(9) =6a(10) =5a(11) =9a(12) =10a(13) =15a(14) =24a(15) =25a(16) =39a(17) =55a(18) =70a(19) =101a(20) =130a(21) =184a(22) =256a(23) =332a(24) =467a(25) =636a(26) =862a(27) =1186a(28) =1596a(29) =2201
External references
- oeis: A264584