Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having directed index change 0,0 0,1 1,0 -1,-2 or 0,2.
A264314
Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having directed index change 0,0 0,1 1,0 -1,-2 or 0,2.
Terms
- a(0) =1a(1) =6a(2) =20a(3) =52a(4) =140a(5) =392a(6) =1117a(7) =3155a(8) =8845a(9) =24812a(10) =69780a(11) =196280a(12) =551796a(13) =1550968a(14) =4359845a(15) =12256597a(16) =34456053a(17) =96861618a(18) =272293072a(19) =765462092a(20) =2151848328a(21) =6049218000a(22) =17005386025a(23) =47805050375a(24) =134388206025a(25) =377788338296
External references
- oeis: A264314