Number of n X 2 0..1 arrays with every element both equal and not equal to some elements at offset (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero.
A278171
Number of n X 2 0..1 arrays with every element both equal and not equal to some elements at offset (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero.
Terms
- a(0) =0a(1) =2a(2) =5a(3) =13a(4) =43a(5) =137a(6) =436a(7) =1394a(8) =4458a(9) =14258a(10) =45607a(11) =145888a(12) =466673a(13) =1492823a(14) =4775347a(15) =15275728a(16) =48865129a(17) =156313412a(18) =500027005a(19) =1599523726a(20) =5116675993a(21) =16367605483a(22) =52357919474a(23) =167486425305a(24) =535768092953
External references
- oeis: A278171