Triangular array T(n,k) giving the number of labeled even graphs with n nodes and k edges for n >= 0 and 0 <= k <= n*(n-1-[0 == n mod 2])/2 (with no trailing zeros).
A054669
Triangular array T(n,k) giving the number of labeled even graphs with n nodes and k edges for n >= 0 and 0 <= k <= n*(n-1-[0 == n mod 2])/2 (with no trailing zeros).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =0a(5) =0a(6) =1a(7) =1a(8) =0a(9) =0a(10) =4a(11) =3a(12) =1a(13) =0a(14) =0a(15) =10a(16) =15a(17) =12a(18) =15a(19) =10a(20) =0a(21) =0a(22) =1a(23) =1a(24) =0a(25) =0a(26) =20a(27) =45a(28) =72a(29) =160
External references
- oeis: A054669