1/12 the number of (n+2)X6 0..2 arrays with each 3X3 subblock containing three of each value.
A184381
1/12 the number of (n+2)X6 0..2 arrays with each 3X3 subblock containing three of each value.
Terms
- a(0) =9113a(1) =13616a(2) =21473a(3) =38642a(4) =104312a(5) =336236a(6) =1348574a(7) =6736118a(8) =35668172a(9) =198726728a(10) =1153450280a(11) =6759631310a(12) =39967552418a(13) =238155498086
External references
- oeis: A184381