Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any element at a city block distance of two.
A182382
Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any element at a city block distance of two.
Terms
- a(0) =1a(1) =3a(2) =34a(3) =5587a(4) =22019098
External references
- oeis: A182382