60639

Appears in sequences

• Number of one-sided hexagonal polyominoes with n cells.at n=9A006535
• Squarefree part of A078522(n+1).at n=3A327248
• Irregular triangle read by rows: T(n,k) is the number of unlabeled connected n-node graphs with intersection number (or edge clique cover number) k; n >= 1, 0 <= k <= floor(n^2/4).at n=65A355755
• Squarefree integers k such that x^4 - k*y^2 = 1 has a nontrivial solution.at n=44A356496