Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300502
Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =5a(1) =3a(2) =7a(3) =20a(4) =32a(5) =68a(6) =191a(7) =504a(8) =1353a(9) =4033a(10) =11685a(11) =33861a(12) =98728a(13) =286160a(14) =829255a(15) =2405240a(16) =6971387a(17) =20210591a(18) =58596872a(19) =169882747a(20) =492538787a(21) =1428005265a(22) =4140151175a(23) =12003425671a(24) =34801083823a(25) =100897399130a(26) =292528300568
External references
- oeis: A300502