Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.
A264630
Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.
Terms
- a(0) =2a(1) =4a(2) =13a(3) =40a(4) =125a(5) =393a(6) =1200a(7) =3759a(8) =11572a(9) =36004a(10) =111380a(11) =345489a(12) =1070564a(13) =3318409a(14) =10285305a(15) =31878944a(16) =98808901a(17) =306255436a(18) =949236490a(19) =2942139012a(20) =9119124333a(21) =28264569620a(22) =87605626309a(23) =271532263929a(24) =841610129904
External references
- oeis: A264630