633555

Appears in sequences

• a(n) = T(2n,n-1), where T is the array in A026323.at n=8A026335
• Numbers k such that both k and k + 1 are logarithmically smooth.at n=16A116486
• Positive integers k such that all the distinct primes that divide k or k+1 are members of a set of consecutive primes. In other words, k is included if and only if k*(k+1) is contained in sequence A073491.at n=27A141399
• The smallest k such that the product k*(k+1) is divisible by the first n primes and no others.at n=7A193314
• Numbers n such that n and n+1 both have 48 divisors.at n=4A274815
• Numbers k such that k and k+1 are both in A357605.at n=19A357608
• a(n) is the largest number m such that A391449(m) = n.at n=0A391602