125712

Appears in sequences

• a(n) = 6*a(n-1) - 6*a(n-2), with a(0)=1, a(1)=3.at n=8A083881
• Numbers with 50 divisors.at n=28A175756
• Numbers with prime factorization pq^4r^4.at n=27A190012
• Numbers such that the largest prime factor equals the sum of the 4th power of the other prime factors.at n=36A244344
• Primitive numbers that are the sum of the squares of two of their distinct divisors.at n=30A338485
• Numbers m such that phi(m)*tau(m) is a square but phi(m)/tau(m) is not the square of an integer.at n=37A341940
• a(n) is the number of large or small squares that are used to tile primitive squares of type 1 whose length of side is A344333(n).at n=28A344334
• a(n) is the number of large or small squares that are used to tile primary squares of type 1 (see A344331) whose side length is A345285(n).at n=36A345286
• a(n) = n^4 * Sum_{p|n, p prime} 1/p^4.at n=35A351244
• Number of integer compositions of n whose parts have weakly decreasing numbers of prime factors (with multiplicity).at n=29A358335