Number of 2 X n 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A280481
Number of 2 X n 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =6a(2) =22a(3) =63a(4) =162a(5) =381a(6) =884a(7) =1995a(8) =4478a(9) =9913a(10) =21832a(11) =47687a(12) =103666a(13) =224117a(14) =482556a(15) =1034819a(16) =2211686a(17) =4712113a(18) =10011696a(19) =21217471a(20) =44862298a(21) =94656621a(22) =199333092a(23) =419016123a(24) =879354062a(25) =1842593961a(26) =3855445784a(27) =8056377655a(28) =16813670338
External references
- oeis: A280481