83522

Appears in sequences

• sigma_4(n): sum of 4th powers of divisors of n.at n=16A001159
• a(n) = n^4 + 1.at n=17A002523
• Numerator of sum of -4th powers of divisors of n.at n=16A017671
• Sum of fourth powers of unitary divisors.at n=16A034678
• a(n) = Sum_{d|n, d==1 (mod 4)} d^4.at n=16A050448
• a(n) = Sum_{d|n, d==1 (mod 4)} d^4.at n=33A050448
• a(n) = Sum_{d|n, d==1 mod 4} d^4 - Sum_{d|n, d==3 mod 4} d^4.at n=16A050456
• a(n) = Sum_{d|n, d==1 mod 4} d^4 - Sum_{d|n, d==3 mod 4} d^4.at n=33A050456
• a(n) = Sum_{d|n, n/d=1 mod 4} d^4.at n=16A050463
• a(n) = Sum_{d|n, n/d=3 mod 4} d^4.at n=50A050467
• a(n) = Sum_{d|n, n/d=1 mod 4} d^4 - Sum_{d|n, n/d=3 mod 4} d^4.at n=16A050468
• Sum of 4th powers of odd divisors of n.at n=16A051001
• Sum of 4th powers of odd divisors of n.at n=33A051001
• a(n) = n^4*Product_{distinct primes p dividing n} (1+1/p^4).at n=16A065960
• Sum of two powers of 17.at n=10A073213
• Binary representation of n interpreted in base p, where p is the smallest prime factor of n: p = A020639(n).at n=16A092524
• Replace 2^i with n^i in binary representation of n.at n=16A104258
• Quartan semiprimes: semiprimes of the form x^4 + y^4, x>0, y>0.at n=35A182277
• Semiprimes of the form n^4 + 1.at n=9A186688
• Integers n such that 6n, 36n, and 216n fall between pairs of twin primes, that is, 6n-1, 6n+1, 36n-1, 36n+1, 216n-1, and 216n+1 are prime.at n=21A192851