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A252476 Least index k such that n = A252486(k), minimal number of 6th powers that sum to k^6; or a(n)=0 if no such k exists. 2
1141, 251, 54, 39, 18, 17, 16, 14, 4, 13, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,1

COMMENTS

It is not known whether a(6)>0.

Further values are a(19)=9, a(21)=7, a(22)=6, a(29)=5, a(36)=3, a(64)=2. The last of these is most probably the last nonzero term of the sequence.

LINKS

Table of n, a(n) for n=7..17.

CROSSREFS

Sequence in context: A206112 A232133 A261572 * A020397 A132410 A252428

Adjacent sequences:  A252473 A252474 A252475 * A252477 A252478 A252479

KEYWORD

nonn,more,hard

AUTHOR

M. F. Hasler, Dec 17 2014

STATUS

approved

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Last modified June 17 15:28 EDT 2019. Contains 324194 sequences. (Running on oeis4.)