47947

Properties

Appears in sequences

• a(n) = floor(n^m) where m = Sum_{k=1..n} (1/k).at n=19A067038
• Sum of proper divisors minus the number of proper divisors of the number of partitions of n, A000041(n).at n=44A152987
• Primes of the form Sum_{k=1..m} (m^k mod (m+k)).at n=30A156557
• Primes having only {4, 7, 9} as digits.at n=29A261183
• T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with each row nonprime and column prime, read as a base 3 number with top and left being the most significant digits.at n=21A262109
• Number of (1+1)X(n+1) 0..2 arrays with each row nonprime and column prime, read as a base 3 number with top and left being the most significant digits.at n=6A262110
• Prime powers that are equal to the sum of the first k prime powers (including 1) for some k.at n=18A364947
• Prime numbersat n=4941