18170

Appears in sequences

• Number of n-node vertex-transitive graphs which are not Cayley graphs.at n=22A006792
• Number of nondecreasing -n..n vectors of length 5 whose dot product with some nonincreasing -n..n vector equals 5.at n=7A226402
• Positions of 2's in A264977; positions of 3's in A277330.at n=53A277712
• Number of compositions of n with all adjacent parts (x, y) satisfying x >= 2y or y = 2x.at n=37A342335
• a(n) = 13*n^2 + 10*n + 3.at n=37A387659