130322

Appears in sequences

• sigma_4(n): sum of 4th powers of divisors of n.at n=18A001159
• a(n) = n^4 + 1.at n=19A002523
• Numerator of sum of -4th powers of divisors of n.at n=18A017671
• Sum of fourth powers of unitary divisors.at n=18A034678
• Sum of 4th powers of odd divisors of n.at n=18A051001
• Sum of 4th powers of odd divisors of n.at n=37A051001
• a(n) = n^4*Product_{distinct primes p dividing n} (1+1/p^4).at n=18A065960
• Value of n-th cyclotomic polynomial at the n-th prime.at n=7A070522
• Sum of two powers of 19.at n=10A073214
• a(0)=0, a(1)=1, a(2n)=19*a(n), a(2n+1)=a(2n)+1.at n=17A197353
• Expansion of a(q)^2 * (c(q)/3)^3 in powers of q where a(), c() are cubic AGM theta functions.at n=18A266288
• a(n) = Sum_{ d >= 1, d divides n} (-1)^(n-d)*d^4.at n=18A279395
• a(n) = Sum_{d|n} (-1)^(n/d+1)*d^4.at n=18A284900
• a(0) = 0, a(n) = Sum_{0<d|n, n/d odd} d^4 for n > 0.at n=19A285989
• a(n) = Sum_{d divides n} (-1)^(d + n/d) * d^4.at n=18A321560
• Sums of two distinct odd fourth powers.at n=35A342832
• Sum of the 4th powers of the squarefree divisors of n.at n=18A351267
• Sum of the 4th powers of the odd proper divisors of n.at n=37A352032