Number of 4X4X4 triangular 0..n arrays with some element plus some adjacent element totalling n+1 or n-1 exactly once.
A270609
Number of 4X4X4 triangular 0..n arrays with some element plus some adjacent element totalling n+1 or n-1 exactly once.
Terms
- a(0) =0a(1) =0a(2) =8808a(3) =171576a(4) =1728288a(5) =13177740a(6) =70129212a(7) =309511644a(8) =1134068490a(9) =3559466436a(10) =10133969880a(11) =25490692140a(12) =60750723804a(13) =131276815188a(14) =274807319832a(15) =531982013820
External references
- oeis: A270609