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!)
A047723 Sum of 12 but no fewer nonzero fourth powers. 2
12, 27, 42, 57, 72, 92, 107, 122, 137, 152, 172, 187, 192, 202, 217, 232, 252, 267, 282, 297, 312, 332, 347, 362, 377, 392, 412, 427, 432, 442, 457, 472, 492, 497, 507, 522, 537, 552, 572, 587, 602, 617, 636, 652, 667, 672, 682, 697, 716, 732, 747, 762 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
David A. Corneth, Table of n, a(n) for n = 1..13916 (terms <= 200000)
PROG
(Python)
from itertools import count, takewhile, combinations_with_replacement as mc
def aupto(limit):
qd = list(takewhile(lambda x: x <= limit, (k**4 for k in count(1))))
ss = [set(sum(c) for c in mc(qd, i)) for i in range(13)]
for i in range(11, 0, -1): ss[12] -= ss[i]
return sorted(s for s in ss[12] if s <= limit)
print(aupto(762)) # Michael S. Branicky, Dec 27 2021
CROSSREFS
Sequence in context: A030736 A227854 A003346 * A151542 A069550 A079705
KEYWORD
nonn
AUTHOR
Arlin Anderson (starship1(AT)gmail.com)
EXTENSIONS
Typo in data corrected by D. S. McNeil, Aug 17 2010
STATUS
approved

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 March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)