30804

Appears in sequences

• Numbers k such that sopf(k) = sopf(k+3), where sopf(k) = A008472(k).at n=28A063969
• Index of the primes in A084165.at n=19A084166
• Indices of primes occurring in A031134.at n=22A122413
• Number of distinct necklaces with n red, n green, n blue and n white beads.at n=3A207816
• Number of distinct k-colored necklaces with n beads per color; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=31A208183
• Number of distinct n-colored necklaces with 3 beads per color.at n=4A208184
• Number of primes <= A214757(n).at n=15A214925
• Rounded down ratio of a minimum intersection area with a unit circle area in n-symmetrical unit circles intersect in a single point.at n=34A243933
• Numbers k such that s(k) = s(k+1), where s(k) is the unitary analog of the alternating sum-of-divisors function (A307037).at n=18A333408
• Number of partitions of n with at least three parts larger than 1.at n=39A362548