Number of perfect matchings in the n X n X n triangular grid, reduced by the spire vertex if n mod 4 equals 1 or 2.
A178446
Number of perfect matchings in the n X n X n triangular grid, reduced by the spire vertex if n mod 4 equals 1 or 2.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =6a(5) =28a(6) =200a(7) =2196a(8) =37004a(9) =957304a(10) =38016960a(11) =2317631400a(12) =216893681800
External references
- oeis: A178446