1080450

Appears in sequences

• a(1)=1, a(n) = Product_{k=2..n} P(k), where P(k) is the largest prime <= k.at n=9A118455
• Records in A160256.at n=40A151545
• Averages of twin prime pairs k such that k*2 and k/2 are squares.at n=30A154670
• The positions of records in A236747.at n=26A237267
• Numbers k with squarefree kernel 210 such that both k-1 and k+1 are prime.at n=35A392030