The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A003337 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A003337

Numbers n which are the sum of 3 nonzero 4th powers.
(history; published version)

#37 by Sean A. Irvine at Sat Jul 31 18:30:21 EDT 2021

STATUS

editing

approved

#36 by Sean A. Irvine at Sat Jul 31 18:30:17 EDT 2021

CROSSREFS

Cf. A003294, A047714, A336536, A309762, A344188.

STATUS

approved

editing

#35 by Alois P. Heinz at Thu Mar 18 15:43:42 EDT 2021

STATUS

reviewed

approved

#34 by Michel Marcus at Thu Mar 18 13:26:24 EDT 2021

STATUS

proposed

reviewed

#33 by Michael S. Branicky at Thu Mar 18 12:50:13 EDT 2021

STATUS

editing

proposed

#32 by Michael S. Branicky at Thu Mar 18 12:49:50 EDT 2021

DATA

3, 18, 33, 48, 83, 98, 113, 163, 178, 243, 258, 273, 288, 338, 353, 418, 513, 528, 593, 627, 642, 657, 707, 722, 768, 787, 882, 897, 962, 1137, 1251, 1266, 1298, 1313, 1328, 1331, 1378, 1393, 1458, 1506, 1553, 1568, 1633, 1808, 1875, 1922, 1937, 2002, 2177

PROG

(Python)

def aupto(lim):

p1 = set(i**4 for i in range(1, int(lim**.25)+2) if i**4 <= lim)

p2 = set(a+b for a in p1 for b in p1 if a+b <= lim)

p3 = set(apb+c for apb in p2 for c in p1 if apb+c <= lim)

return sorted(p3)

print(aupto(2400)) # Michael S. Branicky, Mar 18 2021

STATUS

approved

editing

#31 by OEIS Server at Sat Aug 01 23:46:14 EDT 2020

LINKS

David A. Corneth, <a href="/A003337/b003337_1.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from T. D. Noe)

#30 by N. J. A. Sloane at Sat Aug 01 23:46:14 EDT 2020

STATUS

proposed

approved

Discussion

Sat Aug 01

23:46

OEIS Server: Installed new b-file as b003337.txt.  Old b-file is now b003337_1.txt.

#29 by David A. Corneth at Sat Aug 01 18:06:51 EDT 2020

STATUS

editing

proposed

#28 by David A. Corneth at Sat Aug 01 16:16:12 EDT 2020

LINKS

David A. Corneth, <a href="/A003337/b003337_1.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from T. D. Noe)

STATUS

proposed

editing