The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A346346 Numbers that are the sum of ten fifth powers in exactly one way. 5

%I #6 Jul 31 2021 18:53:47

%S 10,41,72,103,134,165,196,227,252,258,283,289,314,320,345,376,407,438,

%T 469,494,500,525,531,556,587,618,649,680,711,736,742,767,798,829,860,

%U 891,922,953,978,1009,1033,1040,1064,1071,1095,1102,1126,1133,1157,1164

%N Numbers that are the sum of ten fifth powers in exactly one way.

%C Differs from A003355 at term 229 because 4102 = 1^5 + 1^5 + 1^5 + 1^5 + 1^5 + 3^5 + 3^5 + 3^5 + 3^5 + 5^5 = 1^5 + 1^5 + 1^5 + 1^5 + 1^5 + 1^5 + 4^5 + 4^5 + 4^5 + 4^5.

%H Sean A. Irvine, <a href="/A346346/b346346.txt">Table of n, a(n) for n = 1..10000</a>

%e 10 is a term because 10 = 1^5 + 1^5 + 1^5 + 1^5 + 1^5 + 1^5 + 1^5 + 1^5 + 1^5 + 1^5.

%o (Python)

%o from itertools import combinations_with_replacement as cwr

%o from collections import defaultdict

%o keep = defaultdict(lambda: 0)

%o power_terms = [x**5 for x in range(1, 1000)]

%o for pos in cwr(power_terms, 10):

%o tot = sum(pos)

%o keep[tot] += 1

%o rets = sorted([k for k, v in keep.items() if v == 1])

%o for x in range(len(rets)):

%o print(rets[x])

%Y Cf. A003355, A345853, A346336, A346347.

%K nonn

%O 1,1

%A _David Consiglio, Jr._, Jul 13 2021

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 19 19:45 EDT 2024. Contains 372703 sequences. (Running on oeis4.)