Number of (n+1)X3 binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants.
A186895
Number of (n+1)X3 binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants.
Terms
- a(0) =30a(1) =148a(2) =140a(3) =406a(4) =1246a(5) =3106a(6) =7240a(7) =19040a(8) =49004a(9) =124974a(10) =318420a(11) =814714a(12) =2080852a(13) =5324036a(14) =13622742a(15) =34838372a(16) =89070962a(17) =227812618a(18) =582742964a(19) =1490551186a(20) =3812248194a(21) =9750367192a(22) =24938804546a(23) =63787545162a(24) =163151712528a(25) =417295494174
External references
- oeis: A186895