18063

Appears in sequences

• Discriminants of quintic fields with 2 complex conjugates (negated).at n=29A023684
• Lesser of two consecutive numbers each divisible by a fourth power.at n=33A068782
• Numbers n such that (n+j) mod (2+j) = 1 for j from 0 to 5 and (n+6) mod 8 <> 1.at n=21A096024
• Numbers k such that k and k + 1 are both of the form p*q^4 where p and q are distinct primes.at n=5A215197
• Smallest k such that A257743(k)=n.at n=14A257744
• a(n) = greatest k such that A155043(k+A262509(n)) < A155043(A262509(n)).at n=46A262909
• Least number k = concat(x,y) such that k = n*x*y - x - y, -1 if such a number does not exist.at n=14A278935
• Number of integer partitions of n whose parts are all equal or whose distinct parts are pairwise coprime.at n=50A304712
• Near 2-hyperperfect numbers: numbers k such that sigma(k) - 3*k/2 - 1/2 is a proper divisor of k.at n=12A305616
• Numbers k such that both k and k+1 are not exponentially squarefree numbers.at n=12A342188
• Numbers k such that k and k+1 both have the same number of squarefree divisors and powerful divisors.at n=9A360904
• Expansion of (g/(1 + x*g))^3, where g = 1+x*g^4 is the g.f. of A002293.at n=6A391607