1501850

Appears in sequences

• Coordination sequence for A_49 lattice.at n=2A035875
• Numbers k such that core(k) = ceiling(sqrt(k)) where core(k) is the squarefree part of k (the smallest integer such that k*core(k) is a square).at n=32A069187
• a(n) = n^2*(n^2+1).at n=35A071253