Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
A316416
Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =9a(2) =27a(3) =93a(4) =287a(5) =1009a(6) =3496a(7) =11962a(8) =41160a(9) =142076a(10) =489828a(11) =1688040a(12) =5819002a(13) =20061466a(14) =69159010a(15) =238412640a(16) =821894454a(17) =2833376300a(18) =9767673768a(19) =33672696882a(20) =116082018872a(21) =400176917418
External references
- oeis: A316416