164220

Appears in sequences

• LCM of composite numbers falling between n-th and (n+1)-st primes.at n=17A056831
• Product of prime divisors of composite numbers between consecutive primes.at n=18A074167
• a(1) = 1, then LCM of consecutive composite numbers sandwiched between primes.at n=38A109920
• a(0)=1, a(n) = (3n-1)*3n*(3n+1)/2 for n>0.at n=23A157024
• Numbers with prime factorization pqrstu^2.at n=20A189985
• Numbers k such that Euler phi(Dedekind psi(k)) > k.at n=13A196200
• Number of permutations (p(1), p(2), ..., p(n)) satisfying -k <= p(i)-i <= r and p(i)-i not in the set I, i=1..n, with k=2, r=6, I={-1,1,2,3,4,5}.at n=41A224808
• 27-gonal pyramidal numbers: a(n) = n*(n+1)*(25*n-22)/6.at n=34A256647
• a(n) = 2n*(n+1)*(2n+1).at n=34A300758
• Indices of records of A232928.at n=13A329953
• G.f. A(x) satisfies A(x) = 1 + x^4*(1+x)*A(x)^3.at n=30A375691