1024380

Appears in sequences

• Number of 4-valent labeled graphs with n nodes.at n=9A005815
• Numbers k such that 117*2^k+1 is prime.at n=33A032408
• Triangle T(n,k) (n >= 1, 0 <= k <= n-1) giving number of regular labeled graphs with n nodes and degree k, read by rows.at n=40A059441
• Number of connected 4-regular (or quartic) labeled graphs with n nodes.at n=8A272905
• Triangle read by rows: T(n,k) is the number of connected k-regular simple graphs on n labeled vertices, (0 <= k < n).at n=40A324163