Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 5 or 6 king-move adjacent elements, with upper left element zero.
A304668
Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 5 or 6 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =237a(2) =252a(3) =1366a(4) =5311a(5) =15421a(6) =49516a(7) =163216a(8) =516865a(9) =1750074a(10) =5929076a(11) =19375640a(12) =64686597a(13) =216477114a(14) =712798687a(15) =2370003650a(16) =7909241173a(17) =26191198822a(18) =87032751877a(19) =289870295197a(20) =961813760494
External references
- oeis: A304668