Number of n X 4 0..2 arrays with top left element 0, horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and antidiagonal differences never 0.
A229398
Number of n X 4 0..2 arrays with top left element 0, horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and antidiagonal differences never 0.
Terms
- a(0) =8a(1) =34a(2) =153a(3) =711a(4) =3357a(5) =15952a(6) =75965a(7) =362012a(8) =1725628a(9) =8226525a(10) =39219624a(11) =186980973a(12) =891444175a(13) =4250029697a(14) =20262368018a(15) =96602551624a(16) =460560895602
External references
- oeis: A229398