30753

Appears in sequences

• Number of (x -> x^2)-free subsets of symmetric group.at n=7A007234
• Numbers m that minimize | k / EulerPhi(k) - golden ratio phi | when k runs over all the numbers with the same number of digits as m.at n=8A065657
• The floor[n^(3/4)]-perfect numbers, where f-perfect numbers for an arithmetical function f is defined in A066218.at n=21A066363
• a(n) = n^3 + n^2 + 1.at n=31A098547
• a(n) = 961*n + 1.at n=31A158414
• a(n) = 32*n^2 + 1.at n=31A158575
• a(n) = prime(n)^3 + prime(n)^2 + 1.at n=10A181151
• Number of 5X2 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2*n^2 (number of collections of 5 zero-sum 2-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations).at n=25A192705
• Number of (4+2) X (n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=30A252723
• Smallest base b such that there exist exactly n Wieferich pseudoprimes (composites c satisfying b^(c-1) == 1 (mod c^2)) less than b.at n=13A255885
• Difference between upper and lower member of a pair of adjacent perfect powers A340700 and A340701, both with exponents > 2.at n=26A340706