389436

Appears in sequences

• Number of connected regular graphs with n nodes.at n=13A005177
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,31.at n=27A064252
• Triangle read by rows: T(n,k) = number of graphs with n nodes and k connected regular components.at n=78A275420