709937

Appears in sequences

• a(n) = (n/2)*(n^4 + 1).at n=17A021003
• Sum of the 4th powers of the divisors of n is divisible by n.at n=24A046764
• Numbers m such that DivisorSigma(8*k-4, m) mod m = 0 holds presumably for all k; that is, (8*k-4)-power-sums of divisors of m are divisible by m for all k.at n=8A066291
• The terms of A073213 (sums of two powers of 17) divided by 2.at n=16A073221
• G.f.: 1/(1-x) = Sum_{n>=0} a(n) * x^n * Product_{k=1..n} (1 - k*x)/(1 + k*x).at n=7A208832