14350108521domain: NAppears in sequencesa(n) = 1^n + 2^n + ... + 6^n.at n=13A001553Sum of 13th powers: a(n) = Sum_{j=0..n} j^13.at n=6A181134a(n) = Sum_{k=0..floor(n/2)} k^n.at n=13A352981