Number of (n+1) X (2+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.
A264544
Number of (n+1) X (2+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) =5a(3) =10a(4) =21a(5) =44a(6) =93a(7) =196a(8) =413a(9) =870a(10) =1833a(11) =3862a(12) =8137a(13) =17144a(14) =36121a(15) =76104a(16) =160345a(17) =337834a(18) =711789a(19) =1499682a(20) =3159709a(21) =6657252a(22) =14026293a(23) =29552268a(24) =62264245a(25) =131185742a(26) =276397777a(27) =582347822a(28) =1226959889a(29) =2585105520
External references
- oeis: A264544