Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.
A264551
Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =40a(5) =96a(6) =240a(7) =608a(8) =1536a(9) =3840a(10) =9600a(11) =24064a(12) =60416a(13) =151552a(14) =379904a(15) =952320a(16) =2387968a(17) =5988352a(18) =15015936a(19) =37650432a(20) =94404608a(21) =236716032a(22) =593559552a(23) =1488322560a(24) =3731881984a(25) =9357492224a(26) =23463460864a(27) =58833502208a(28) =147522060288
External references
- oeis: A264551