Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,0 0,1 1,0 or -1,-2.
A264286
Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,0 0,1 1,0 or -1,-2.
Terms
- a(0) =1a(1) =10a(2) =32a(3) =102a(4) =360a(5) =1228a(6) =4156a(7) =14148a(8) =48188a(9) =163956a(10) =557884a(11) =1898612a(12) =6461148a(13) =21987412a(14) =74824380a(15) =254631924a(16) =866526236a(17) =2948835860a(18) =10035051900a(19) =34149835828a(20) =116213772252a(21) =395481874772
External references
- oeis: A264286