Number of nX3 0..1 arrays with no element equal to more than four of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A281931
Number of nX3 0..1 arrays with no element equal to more than four of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =1a(2) =20a(3) =312a(4) =3573a(5) =31410a(6) =252630a(7) =1925590a(8) =14065552a(9) =99735307a(10) =691339079a(11) =4705890596a(12) =31562889402a(13) =209107683151
External references
- oeis: A281931