Number of nXnXn triangular 0..1 arrays with some element plus some adjacent element totalling 1+1 exactly once.
A270503
Number of nXnXn triangular 0..1 arrays with some element plus some adjacent element totalling 1+1 exactly once.
Terms
- a(0) =0a(1) =3a(2) =15a(3) =126a(4) =1149a(5) =14220a(6) =230247a(7) =5038371a(8) =149342775a(9) =6042348225a(10) =334920898542
External references
- oeis: A270503