Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 1,0 0,-1 1,2 or -1,1.
A264586
Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 1,0 0,-1 1,2 or -1,1.
Terms
- a(0) =0a(1) =4a(2) =4a(3) =28a(4) =97a(5) =333a(6) =1380a(7) =4497a(8) =16712a(9) =61820a(10) =220148a(11) =817438a(12) =2928108a(13) =10697750a(14) =38920136a(15) =141054653a(16) =514441936a(17) =1866146690a(18) =6788624488a(19) =24686203092a(20) =89672098757a(21) =326220334103
External references
- oeis: A264586