Number of perfect matchings in triangle graph with n nodes per side.
A039907
Number of perfect matchings in triangle graph with n nodes per side.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =2a(4) =6a(5) =0a(6) =0a(7) =2196a(8) =37004a(9) =0a(10) =0a(11) =2317631400a(12) =216893681800a(13) =0a(14) =0a(17) =0a(18) =0a(21) =0a(22) =0
External references
- oeis: A039907