541696
domain: N
Appears in sequences
- Squares of even octagonal numbers.at n=8A014794
- Expansion of Product_{m>=1} (1+x^m)^8.at n=13A022573
- Even squares in which parity of digits alternates.at n=20A030158
- Least number x such that gcd(phi(x), sigma(x)) = n.at n=22A073815
- Smallest number m such that GCD(a+b,a-b) = n, where a = sigma(m) and b = phi(m).at n=22A077102
- Least x=a(n) such that product of common prime-divisors [without multiplicity] of sigma(x) and phi(x) equals n; or 0 if n is not a squarefree number or if no such x exists. Among indices n only squarefree numbers arise because multiplicity of prime factors is ignored.at n=22A082057
- Square perimeters of primitive Pythagorean triangles.at n=26A120089
- Squares which when subtracted from their reverse form nonzero squares.at n=4A152071
- Squares k such that, if k has d digits, k has at least one digit in common with every other d-digit square.at n=25A173943
- Numbers with 33 divisors.at n=8A175743
- Square numbers with at least one digit in common with any other positive square number.at n=15A182657
- Number of (w,x,y,z) with all terms in {1,...,n} and w<=2x and y<=2z.at n=31A212506
- Number of subsets of {1..n} that cannot be linearly combined using nonnegative coefficients to obtain n.at n=31A365380
- Perfect powers k such that A052409(k) is equal to A052409(A366275(k)).at n=23A366278