30609

Appears in sequences

• a(n) = (10n+1)*(10n+9).at n=17A001535
• Where records occur in A118522.at n=16A118524
• Positive numbers of the form x^5-10x^3*y^2+5x*y^4 (where x,y are integers and x>y).at n=8A135791
• Numbers of the form x^5-10x^3*y^2+5x*y^4 (where x,y are integers).at n=28A135793
• Expansion of Product_{k>=1} 1/(1 - x^k)^(p(k)-p(k-1)), where p(k) = number of partitions of k (A000041).at n=25A304967