Number of 3Xn arrays containing n copies of 0..3-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.
A267726
Number of 3Xn arrays containing n copies of 0..3-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.
Terms
- a(0) =0a(1) =2a(2) =2a(3) =30a(4) =58a(5) =588a(6) =2388a(7) =17456a(8) =102874a(9) =731154a(10) =5027962a(11) =36610288a(12) =266876496a(13) =1982397806a(14) =14796809106a(15) =111298650288a(16) =840466993090
External references
- oeis: A267726