Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,1 0,-2 1,0 or -1,0.
A264294
Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,1 0,-2 1,0 or -1,0.
Terms
- a(0) =2a(1) =9a(2) =20a(3) =56a(4) =169a(5) =441a(6) =1258a(7) =3520a(8) =9701a(9) =27216a(10) =75725a(11) =210743a(12) =588040a(13) =1637433a(14) =4562629a(15) =12715864a(16) =35425613a(17) =98714880a(18) =275062034a(19) =766408103a(20) =2135548297a(21) =5950451808a(22) =16580224900a(23) =46199140975a(24) =128728625258a(25) =358688168631
External references
- oeis: A264294