81450625

Appears in sequences

• a(n) = (5n)^4.at n=19A016852
• a(n) = (6*n + 5)^4.at n=15A016972
• a(n) = (7*n + 4)^4.at n=13A017032
• a(n) = (8*n + 7)^4.at n=11A017152
• a(n) = (9*n + 5)^4.at n=10A017224
• a(n) = (10*n + 5)^4.at n=9A017332
• a(n) = (11*n + 7)^4.at n=8A017476
• a(n) = (12*n + 11)^4.at n=7A017656
• First occurrence of consecutive refactorable numbers a(n)-1, a(n) where the smallest prime factor of a(n) is the n-th prime prime(n).at n=2A120314
• Consecutive refactorable numbers a(n)-1, a(n) in which 5 is the smallest prime divisor of a(n).at n=0A120316
• RF(5): refactorable numbers with smallest prime factor 5.at n=7A120320