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A256812 Smallest k>=1 such that n^6 + (n+1)^6 + ... + (n+k)^6 is prime or a(n)=0 if there is no such k. 1
0, 2, 0, 2, 0, 0, 0, 0, 5, 0, 0, 6, 20, 0, 0, 5, 20, 0, 20, 0, 5, 13, 5, 5, 0, 0, 0, 0, 5, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 6, 20, 0, 41, 2, 0, 5, 13, 0, 0, 0, 0, 6, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 20, 0, 20, 41, 0, 0, 0, 5, 0, 0, 0, 41, 0, 13, 20 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Using similar arguments as in comment in A256547, we obtain that every term is 0,2,5,6,13,20,41.

LINKS

Peter J. C. Moses, Table of n, a(n) for n = 1..1000

CROSSREFS

Cf. A001014, A089306, A256385, A256503, A256546, A256547, A256581.

Sequence in context: A342121 A258764 A109083 * A292251 A231715 A137678

Adjacent sequences:  A256809 A256810 A256811 * A256813 A256814 A256815

KEYWORD

nonn

AUTHOR

Vladimir Shevelev and Peter J. C. Moses, Apr 10 2015

STATUS

approved

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Last modified January 17 05:13 EST 2022. Contains 350378 sequences. (Running on oeis4.)