OFFSET
1,1
COMMENTS
LINKS
David Consiglio, Jr., Table of n, a(n) for n = 1..20000
EXAMPLE
33 is a member of this sequence because 33 = 1^4 + 2^4 + 2^4
PROG
(Python)
from itertools import combinations_with_replacement as cwr
from collections import defaultdict
keep = defaultdict(lambda: 0)
power_terms = [x**4 for x in range(1, 50)]
for pos in cwr(power_terms, 3):
tot = sum(pos)
keep[tot] += 1
rets = sorted([k for k, v in keep.items() if v == 1])
for x in range(len(rets)):
print(rets[x])
CROSSREFS
KEYWORD
nonn
AUTHOR
David Consiglio, Jr., May 11 2021
STATUS
approved