937574

Appears in sequences

• Number of polyominoes with n cells whose symmetry group (excluding reflections) has order at least 2.at n=24A144554
• Denominators of the fraction Sum_{n>=0} {a(n)/a(n+1)} = a(0)/a(1) + a(1)/a(2) + a(2)/a(3) + ... such that the sum has the concatenation of these denominators as decimal part. Case a(0) = 1 and a(1) = 4.at n=3A305665