90510

Appears in sequences

• Numbers whose sum of divisors is a fifth power.at n=27A019423
• Third diagonal of A027446.at n=10A027450
• Number of n-digit primes with all digits distinct.at n=7A073532
• Duplicate of A073532.at n=7A098225
• Structured triakis octahedral numbers (vertex structure 4).at n=29A100171
• Triangle of Schroeder paths counted by number of diagonal steps not preceded by an east step.at n=59A108916
• a(n) = n * A056219(n+1).at n=34A166869
• Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|<|y-z|.at n=21A212681
• Least number k such that n*k^n +/- 1 are twin primes, or a(n) = 0 if no such number exists.at n=30A239735
• Least k such that k is the product of n distinct primes and sigma(k) is an n-th power.at n=4A281140