Number of nX2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.
A222284
Number of nX2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.
Terms
- a(0) =0a(1) =0a(2) =4a(3) =11a(4) =8a(5) =44a(6) =144a(7) =352a(8) =692a(9) =2488a(10) =6476a(11) =17095a(12) =43308a(13) =131488a(14) =340000a(15) =939959a(16) =2520616a(17) =7194232a(18) =19142160a(19) =53471296a(20) =145636612a(21) =407743540a(22) =1107902624a(23) =3092203004a(24) =8488056840a(25) =23644607144a(26) =64986279340a(27) =181063135999a(28) =499746197884
External references
- oeis: A222284