Half the number of (n+1) X 2 binary arrays with no 2 X 2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
A184606
Half the number of (n+1) X 2 binary arrays with no 2 X 2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
Terms
- a(0) =8a(1) =28a(2) =98a(3) =350a(4) =1250a(5) =4450a(6) =15842a(7) =56426a(8) =200978a(9) =715786a(10) =2549282a(11) =9079418a(12) =32336882a(13) =115169482a(14) =410182082a(15) =1460885210a(16) =5203020050a(17) =18530830570a(18) =65998531298a(19) =235057255034a(20) =837168828722
External references
- oeis: A184606