Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having directed index change -1,1 0,-1 0,1 or 1,0.
A264508
Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having directed index change -1,1 0,-1 0,1 or 1,0.
Terms
- a(0) =2a(1) =2a(2) =14a(3) =38a(4) =137a(5) =432a(6) =1417a(7) =4554a(8) =14710a(9) =47394a(10) =152762a(11) =492284a(12) =1586369a(13) =5112128a(14) =16473473a(15) =53085636a(16) =171065674a(17) =551254626a(18) =1776394534a(19) =5724372546a(20) =18446568521a(21) =59443412528a(22) =191554172489a(23) =617276369198
External references
- oeis: A264508