1067574

Appears in sequences

• G.f.: Product_{m>0} (1 - x^m + 2!*x^(2*m) - 3!*x^(3*m) + 4!*x^(4*m) - 5!*x^(5*m)).at n=36A293257
• Number of n-step walks from a universal vertex to the other on the diamond graph.at n=16A344236