Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero.
A304220
Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =103a(2) =93a(3) =190a(4) =509a(5) =1628a(6) =4263a(7) =11307a(8) =32315a(9) =89108a(10) =241808a(11) =671482a(12) =1860876a(13) =5112838a(14) =14112560a(15) =39021398a(16) =107604674a(17) =296850358a(18) =819720184a(19) =2262238142a(20) =6242240358a(21) =17229841514a(22) =47554661392a(23) =131237610194a(24) =362206032762
External references
- oeis: A304220