Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,0 1,1 0,-1 -1,1 or 0,-2.
A264246
Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,0 1,1 0,-1 -1,1 or 0,-2.
Terms
- a(0) =3a(1) =21a(2) =95a(3) =557a(4) =3303a(5) =18725a(6) =105839a(7) =602365a(8) =3432551a(9) =19548549a(10) =111260799a(11) =633294925a(12) =3605196759a(13) =20523670997a(14) =116833710703a(15) =665088330013
External references
- oeis: A264246