Number of n X 2 0..2 arrays with every element equal to some element at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0) both plus 1 mod 3 and minus 1 mod 3, with new values introduced in order 0..2.
A277653
Number of n X 2 0..2 arrays with every element equal to some element at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0) both plus 1 mod 3 and minus 1 mod 3, with new values introduced in order 0..2.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =2a(4) =8a(5) =28a(6) =98a(7) =346a(8) =1218a(9) =4290a(10) =15110a(11) =53218a(12) =187438a(13) =660170a(14) =2325166a(15) =8189402a(16) =28843662a(17) =101589450a(18) =357805342a(19) =1260216122a(20) =4438571726a(21) =15632968522a(22) =55060438334a(23) =193926819802a(24) =683024192622
External references
- oeis: A277653