Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 1,0 1,1 0,-1 or -1,1.
A264570
Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 1,0 1,1 0,-1 or -1,1.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =24a(5) =64a(6) =160a(7) =384a(8) =960a(9) =2432a(10) =6144a(11) =15360a(12) =38400a(13) =96256a(14) =241664a(15) =606208a(16) =1519616a(17) =3809280a(18) =9551872a(19) =23953408a(20) =60063744a(21) =150601728a(22) =377618432a(23) =946864128a(24) =2374238208a(25) =5953290240a(26) =14927527936a(27) =37429968896a(28) =93853843456a(29) =235334008832
External references
- oeis: A264570