76832

Appears in sequences

• Numbers k such that sigma(phi(k)) = phi(sigma(k)).at n=17A033632
• Numbers whose prime factors are 2 and 7.at n=36A033847
• Numbers k that can be expressed as k = w+x = y*z with w*x = (y+z)^3 where w, x, y, and z are all positive integers.at n=29A057370
• For the numbers k that can be expressed as k = w + x = y*z with w*x = y^3 + z^3 where w, x, y, and z are all positive integers, this sequence gives the corresponding values of w*x.at n=9A057443
• Numbers k such that sigma(phi(k)) divides phi(sigma(k)).at n=31A073858
• Terms m of A003337 such that m+1 is also in A003337. I.e., smaller one of two consecutive numbers, both equal to a sum of three 4th powers.at n=9A085322
• Numbers k such that sigma(phi(k)) == phi(sigma(k)) (mod k), that is, A033632(k)/k is an integer.at n=19A092584
• a(n) = n^4*(n+1)^2/2.at n=7A163274
• Numbers of the form p^4*q^5 where p and q are two distinct primes.at n=4A179702
• Suppose n has prime factorization n=p1^a1*p2^a2*...*pk^ak and that D(n) is A006218, then n has all D(ai) even.at n=40A197917
• Number of (w,x,y,z) with all terms in {1,...,n} and |w-x| >= w + |y-z|.at n=28A212714
• Number of (w,x,y,z) with all terms in {0,...,n} and max{w,x,y,z}<2*min{w,x,y,z}.at n=28A212740
• Number of (w,x,y,z) with all terms in {0,...,n} and max{w,x,y,z}<=2*min{w,x,y,z}.at n=27A212742
• Number of (w,x,y,z) with all terms in {0,...,n} and w, x, and y even.at n=27A212759
• Number of (w,x,y,z) with all terms in {0,...,n}, w odd, x and y even.at n=27A212761
• Number of (w,x,y,z) with all terms in {0,...,n}, w and x odd, y even.at n=27A212762
• Number of (w,x,y,z) with all terms in {0,...,n}, and w, x and y odd.at n=27A212763
• a(n) = n^4/8 if n is even, a(n) = (n^2-1)^2/8 if n is odd.at n=28A212892
• Numbers n such that the binary XOR of the divisors of n (A178910) is a binary palindrome (A006995) and not a power of 2 (A000079).at n=29A226643
• a(n) = 2*n^4.at n=14A244730