3031081

Appears in sequences

• Crystal ball sequence for D_4 lattice.at n=29A007204
• E.g.f: exp(x/(1-4*x))/sqrt(1-16*x^2).at n=6A115330
• Nontrivial prime powers (A025475) which are a sum of a smaller nontrivial prime power and a perfect square.at n=36A226230
• Prime powers (A025475) such that the distance to the nearest square is a square.at n=19A239582
• Prime powers (A025475) such that the distance to the nearest square is a prime power.at n=14A239583