1/4 the number of (n+1) X 6 0..2 arrays with every 2 X 2 subblock having distinct edge sums.

A209379

1/4 the number of (n+1) X 6 0..2 arrays with every 2 X 2 subblock having distinct edge sums.

Terms

    a(0) =64a(1) =170a(2) =320a(3) =1076a(4) =2176a(5) =8648a(6) =18176a(7) =78800a(8) =168448a(9) =758816a(10) =1633280a(11) =7474496a(12) =16132096a(13) =74296448a(14) =160526336a(15) =741182720a(16) =1602101248a(17) =7404724736a(18) =16008396800a(19) =74018886656a(20) =160033570816a(21) =740075522048

External references